JIT logistics concept. Logistics technology JIT - Just-in-time (Just in time) Just in time application

In recent years, attention to the issues of increasing production efficiency has increased dramatically. The views on the construction of the economic mechanism, organizational structures of management, methods of strategic and operational planning are radically changing. The transition to market relations has led to the fact that the heads of enterprises must solve qualitatively new tasks.

As the experience of successful competition in the world market of advanced firms and companies shows, a special place in management processes should be given to the development and implementation of methods to reduce production costs. In particular, Japanese managers proceed from the premise that “it is not the one who earns a lot who gets rich, but the one who spends little.” Methods of intra-corporate management should be directed to the implementation of this idea and the valley.

Today we can say that in world practice there are two fundamentally different approaches to the organization of intra-company planning, both of which are based on their own idea of managing inventory. These are the kanban system and the just-in-time system. But we will dwell in more detail on the method of inventory management "just in time" or "just in time", abbreviated "jit".

As you know, the system "just in time" first appeared in Japan. The organization of production at Japanese industrial enterprises has always aroused and is of great interest all over the world. Researchers of the "Japanese phenomenon" initially looked for the reasons for success not so much in economic factors as in the socio-cultural characteristics of the country. Both, of course, have played and continue to play a big role. Western sociologists attach paramount importance to the national character, the high consciousness of Japanese workers, their ability to work conscientiously, to subordinate their interests to the interests of the collective, the high quality of work, and the thirst for knowledge. But still, the main reason for success in the Japanese economy lies in management methods. And economists, among the many reasons for success, single out the Just-in-time system that was born there.

In general, while "kanban" is purely a Japanese word, "just in time" is just an English expression used in Japanese business circles and may not have a Japanese equivalent. Production veterans said that the expression "just in time" came into use around 1960. During the time period in question, Japanese manufacturers, as a result of rapid development, accumulated such large excess production capacity that the supply of steel products to the shipbuilding industry began to be carried out in an extremely short time. Shipbuilders tried to make the most of the situation by reducing the steel product inventories from a month to a three-day norm. They began to receive just-in-time steel. This idea was then taken up by other end-product companies, who also demanded just-in-time deliveries from their suppliers and incorporated the same approach into the manufacturing process.

The Just-in-Time Method became known throughout the world due to the fact that in the mid-70s, Toyota Vice President Tahiti Ohno and several of his colleagues gave a clear explanation of the concept laid down in a series of reports, articles and books.

One of the pioneers in the introduction of this system was the electrical corporation General Electric. In 1980, two of its factories developed projects for the restructuring of production according to the "just in time" system, in 1981 - at 10, 1982-20 and 1983 - at 40 factories. Much of this work was done in the automotive industry in the United States. A little later, many US companies began to use this system, and even a consulting firm was created and functioned, which arranged seminars and trained managers in the implementation of the JIT system.

"Right on time"- a system of planning and management of material and technical supply, providing for its full synchronization with production processes. Within its framework, raw materials, semi-finished products and components are supplied (often from other enterprises of a given company or related firms) in small batches directly to the required points of the technological process, bypassing the warehouse, and finished products are immediately shipped.

The concept of "just in time" seems to be at the heart of Japan's industrial production management system and the basis for improving labor efficiency. The idea is simple: to produce and deliver finished products just in time for their implementation, component parts - by the time the finished product is assembled, individual parts - by the time the units are assembled, materials - by the time the parts are manufactured. As one joker put it, Japanese industry produces small batches of "just in time" goods, while Western industry produces giant batches of "just in case" goods. Of course, it is just as impossible to produce absolutely “on time” as it is to produce a product of perfect quality, but this ideal must be persistently striven for.

This ideal is the active use of all materials as elements of the production process, as opposed to their passive presence in the stock stage, when they play only the role of storage media. This is a way of organizing production on the principle of "from a spoon directly to the mouth", when the production stocks and supply volumes are close to unity, that is, the production and promotion of products is carried out by detail.

This method is able to give much greater productivity and high quality products, it makes visible the results of labor at each workplace, which increases the responsibility and interest of workers in these results. The scope of the just-in-time method can also be extended to product marketing and the procurement of raw materials and materials, where its advantages are also obvious.

The system is based on "kanban", which is informational in relation to it and allows you to effectively regulate production, reduce inventory and time costs by 90%, labor - by 10-30%, indirect costs - by 50-60%; improve quality by 75-90%.

In this context, it is necessary to single out and characterize the fundamental idea of the method, which is based on three premises (their correctness has been repeatedly confirmed empirically).

Firstly, it is assumed that the requests of consumers of finished products should correspond not to its pre-accumulated stocks,
and production facilities ready to process raw materials coming almost to its wheels”. As a result, the amount of inventory that qualifies as frozen capacity is minimized.

Secondly, in conditions of minimal stocks, continuous rationalization is necessary in the organization and management of production, because a high volume of stocks levels out, in a sense, masks errors and shortcomings in this area, production bottlenecks, unsynchronized operations, unused production facilities, unreliable work of suppliers and intermediaries.

Thirdly, in order to assess the efficiency of the production process, in addition to the level of costs and productivity of funds, one should take into account the period for the implementation of the application, the so-called duration of the full production cycle. Short deadlines for the implementation of applications facilitate the management of the enterprise and contribute to the growth of competitiveness due to the possibility of prompt and flexible response to changes in external conditions.

What does it take to implement a just-in-time system? First of all, technological progress should be maximally adapted to all kinds of innovations, changes, improvements, rationalization, including ensuring the possibility of timely change of the nomenclature, change in output volumes, replacement of equipment, variation in other parameters and the implementation of a number of other factors that cannot be foreseen in advance and must be decided during the production process.

Therefore, the creation of a "rigid" technological process, all the parameters of which would be accurately calculated in advance, is both impossible and impractical, but the Japanese model is an example of the maximum striving for such conditions, although it does not exclude the creation of some "buffer" reserve of resources. There must be some kind of reserve that allows you to have some kind of backlash for the normal functioning of the production process.

Of course, firms were working to reduce inventories and work in progress. However, the possibilities of the classical (traditional) system of operational management of both the production process and inventories have been practically exhausted. Therefore, in order to further reduce the losses under consideration (excess inventories and a large volume of work in progress), it was necessary to introduce a fundamentally new system of operational production management. The flexibility of management was achieved by accumulating "buffer" stocks at the base sections of the production cycle. The planning methodology, which was widely accepted at that time, coordinated (joined) the dynamics of demand for products and production programs.

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Logic concept just in time

Introduction

1.1 JIT concept

1.2 Goals of the system

1.3 Building Blocks System

Chapter 2. Micrologistic systems based on the JIT concept

2.1 Basic concepts

Chapter 3. Practical application of the logical concept of JIT

3.1 Implementation of Just In Time

3.2 JIT example

3.4 Future of JIT

Conclusion

List of used literature

Introduction

Just-in-time production. JIT what is it? To fully understand JIT, you need to have a good understanding of its basic logic. Without a conceptual framework, the study of JIT becomes a confusing array of methods, acronyms, and river drainage analogies. This course work is devoted primarily to the philosophy and main principles of JIT. Its purpose is to provide a foundation on which to proceed with further, more detailed study of JIT and its results.

Why is Just-In-Time (JIT) manufacturing so interesting? First of all, because of the success of Japanese manufacturers. JIT has clearly demonstrated the possibility of improving quality, reducing costs and reducing delivery times at the same time. Therefore, Japanese manufacturers have achieved a dominant position in the world markets for many products, from consumer electronics to cars.

A lot has been written about the harmony of an enterprise operating on the principles of JIT. However, to achieve such simplicity and harmony, you need to go through a complex and intense process, and the chances of success in it are not so great. The implementation of JIT is associated with a certain risk, but if successful, the company will receive a worthy reward in the form of a competitive advantage. In some markets, there is little choice: the effectiveness of the JIT approach has made it a must-have tool to compete. In today's global competitive environment, understanding JIT is extremely important for making qualified decisions about the organization of production. This article, or more precisely, the study of the underlying philosophy of JIT, will serve as a help for this understanding.

A number of companies, Toyota among the first, spent years in the 1970s developing the concept of "just in time" (just in time) or JIT, another name for "just in time". These methods have proved so effective that all large organizations now use elements of this approach to some extent. The traditional approach to work organization assumes that stocks are an important element of the entire system, ensuring that operations do not fail. MRP reduces inventory using the master schedule in a way that provides a closer match between material supply and demand, while still maintaining some safety stock in case of unforeseen problems. Obviously, the higher the degree of correspondence between supply and demand, the less stock we will need. If we manage to fully eliminate the mismatch between supply and demand, we will not need stocks at all. This is the basis of just-in-time work.

The relevance of the topic of this course work is that there are many interpretations of this method. Most often, the basis of the method is defined as the work of an enterprise without a warehouse and stocks; procurement and production are carried out accurately and on time, managed by the KANBAN system, or "work from wheels".

Conceptually JIT- the approach served as the basis for the subsequent introduction of such logistics concepts / technologies as Lean Production, (“Flat”, or “thin” production) and Value added logistics - “Value Added Logistics”

Thus, the subject of the course work is the JIT concept and micrologistics systems based on it: the KANBAN production management system and the TMQ quality management system and others.

Chapter 1. Fundamentals of the logical concept of JIT

1.1 JIT concept

The main idea of JIT: if the production schedule is set (abstracting from demand and orders), then it is possible to organize the movement of material flows so that all materials and components will arrive in the right quantity at the right place and exactly at the appointed time for production or assembly. In this case, stocks of material resources are not needed. Thus, the main task is to coordinate supply with production management, or more abstractly, to synchronize the needs for MP (material resources) with the flow of MP.

The main assumption is the possibility of synchronizing the emergence of MR needs with their supplies. There are at least two main assumptions of this concept: it is possible to ensure the supply of MR exactly on time; it is possible to predict the demand for finished products (FP) at least for the delivery time + production time; Hence the requirement for a quick response to changes in demand and, accordingly, a quick change in the production program.

The essence of the JIT system is to abandon the production of products in large batches. Instead, a continuous-flow object production is being created. At the same time, the supply of production shops and sites is carried out in such small batches that it essentially turns into a piece. This system considers the presence of inventories as an evil, the existence of which makes it difficult to solve many problems. Requiring significant maintenance costs, large inventories adversely affect the lack of financial resources, flexibility and competitiveness of the enterprise. From a practical point of view, the main goal of the JIT system is the elimination of any unnecessary costs and the efficient use of the production potential of the enterprise.

The JIT system is more demand-driven than the traditional "throw-to-market" method. Under this system, the principle is to produce products only when they are needed, and only in such quantities as buyers require. Demand accompanies products through the entire production process. Each operation produces only what is required for the next operation. The production process does not start until a signal is received from the site of the subsequent operation to start production. Parts, assemblies and materials are delivered only at the time of their use in the production process.

The JIT system involves reducing the size of processed batches, the virtual elimination of work in progress, minimizing the amount of inventory and inventory, and fulfilling production orders not by months and weeks, but by days and even hours. Under these conditions, the system of production accounting is also simplified, since it becomes possible to record materials and production costs on one unified account. In addition, when using this system, part of the enterprise's costs from the category of indirect ones goes into the category of direct ones. For example, in a JIT production environment, production line workers involved in the production of products are also required to perform maintenance, repair and adjustment work, which under traditional conditions are carried out by other workers and are classified as indirect costs. This, in turn, increases the accuracy of calculating the unit cost of production.

The concept of JIT is closely related to functional logistics cycles and their components. In the ideal case, MR, NP or GP should be delivered to a certain point in the supply chain (channel) at the very moment when they are needed (not earlier and not later), which eliminates excess stocks in the functional areas of the company's business. Many modern medicines based on the JIT approach are focused on short components of logistics cycles, which requires a quick response of the medicines to changes in demand and, accordingly, a flexible production program.

The logistics concept of JIT is characterized by the following main features:

Minimum (zero) guarantee/insurance reserves of MR, NP, GP;

Short production (logistics) cycles;

Small volumes of GP production and replenishment of stocks (supplies);

Relationships (purchasing MR) with a small number of reliable suppliers and carriers;

Effective information support;

High quality GP and logistics service.

An interesting example illustrating the essence of "just in time" work is the operation of a gas stove on bottled gas and on gas supplied through a pipeline. In the first case, sometimes there is a discrepancy between the presence of fuel in the cylinder and the need for it. To eliminate interruptions, it is necessary to purchase gas cylinders in advance, i.e. create stock. In the second case, the supply of gas exactly matches the demand, and the consumer does not have any fuel supply.

The work of the logistics system, built on the principles of the "just in time" concept, can be represented as a two-bin inventory management system. One bunker is used to meet the demand in production or marketing, respectively, for material resources or finished products, the other is replenished as the first one is spent. Emphasis is placed on the placement of equipment in such a way as to ensure a continuous production process. Where possible, automation of both the production process and the processing of raw materials is being introduced. Often the equipment is placed in the shape of the letter U, which contributes to teamwork, flexibility of work, cyclical processing of raw materials and products. At the same time, product developers strive to standardize time cycles and the production of a constant set of products based on a monthly production plan throughout the system. This practice turns the production process into a cycle of at least a month.

Thus, the production of finished products in small batches for relatively short production cycles determines the duration of the supply cycles of material resources.

This concept is based on the belief that stocks arise due to poor management, poor coordination of work and therefore problems are hidden in stocks. From this follows the conclusion that it is necessary to find the causes that cause the difference between supply and demand, improve the performance of operations, after which the stocks will disappear. More broadly, JIT considers an enterprise as a set of problems that hinder the efficient execution of operations, for example, long lead times, order delivery instability, operations that are unbalanced with each other, limited capacity, equipment breakdowns, defective materials, work interruptions, unreliable suppliers, low GP quality, too much paperwork, and more. Managers try to solve these problems by building reserves, acquiring additional capacity, installing backup equipment, hiring "firefighting" specialists, and so on. However, in reality, these actions only hide the causes of problems. A constructive approach is to identify real problems and solve them. The concept of JIT leads to a change in views in the following areas:

Stocks. Organizations should identify and address inventory issues by aiming for minimum (zero) inventories of WIP, WIP, and WIP.

Quality. It is necessary to achieve not an acceptable level of marriage, but its complete absence on the basis of integrated quality management.

Suppliers. Customers must fully rely on their suppliers, so they need to establish long-term partnerships with a small number of reliable suppliers and carriers.

Lot size. It is necessary to look for ways to reduce the volume of production batches, to achieve short production cycles so that excess production does not accumulate in the stocks of SOEs.

Lead time. It is necessary to reduce lead times in order to reduce the uncertainties that can change the situation during a long delivery time.

Reliability. All operations must run continuously without failure, i.e. there should be no equipment breakdowns, marriage, absenteeism, etc.

Employees. A spirit of cooperation is needed, both between workers and between managers and workers. the well-being of all depends on the general success in work; all workers should be treated equally and fairly. Any creative initiative expressed by any employee about possible improvements in work is encouraged.

Information support should allow for the rapid exchange of information and synchronization of all processes for the supply of MR, production and assembly, and the supply of GP.

Thus, JIT is not only a way to minimize inventory, but also eliminate waste from any type of resource, improve coordination and increase efficiency.

1.2 Goals of the system

The ultimate goal of the system is a balanced system; that is, one that provides a smooth and fast flow of materials through the system. The main idea is to make the process as short as possible, using resources in an optimal way. The degree to which this goal is achieved depends on the extent to which additional (auxiliary) goals are achieved, such as:

Eliminate failures and violations of the production process.

Make the system flexible.

Reduce the preparation time for the process and all production periods.

Minimize inventories.

Eliminate unreasonable costs.

Process failures and disturbances have a negative impact on the system, disrupting the smooth flow of products, so they must be eliminated. Breakdowns are caused by a wide variety of factors: poor quality, equipment failure, schedule changes, late deliveries. All these factors should be eliminated whenever possible.

Lead times and production times lengthen the process without adding anything to the cost of the product. In addition, the length of these deadlines has a negative impact on the flexibility of the system. Therefore, their reduction is very important and is one of the goals of continuous improvement.

Inventories are unused resources that take up space and increase the cost of production. They should be minimized or, if possible, eliminated altogether.

Unjustified expenses represent unproductive resources; eliminating them can free up resources and expand production. In the Just-in-Time philosophy, unreasonable expenses include:

Overproduction;

waiting time;

Unnecessary transportation;

Storage of inventories;

Marriage and waste;

Inefficient working methods;

Product defects.

The existence of such unreasonable expenses indicates an opportunity for improvement, or a list of unreasonable expenses identifies potential goals for continuous improvement.

1.3 Building Blocks System

Design and production in the JIT system are the basis for fulfilling the above goals. This foundation consists of four building blocks:

Product development.

Process development.

Personnel/organizational elements.

Planning and production management.

Speed and simplicity are two common elements that run through these building blocks.

1. Product development. Three elements of product design are key to a just-in-time system:

Standard accessories

Modular design

Quality

The first two elements are related to speed and simplicity.

Using standard parts means workers have to deal with fewer parts, which reduces training time and costs. Purchasing, processing and quality control are more standardized and allow for continuous improvement. Another important advantage is the use of a standard processing procedure.

Modular design is a kind of extension of the concept of standard components. Modules are groups of parts assembled into a single unit (and therefore representing a separate unit). This greatly reduces the number of parts to work with, simplifies assembly, purchasing, processing, training, and so on. Standardization has the added benefit of reducing the length of the material list for different products, i.e. simplifying this list.

The disadvantages of standardization are that products are less diverse and resist changes to their standard designs. These inconveniences are somewhat reduced where different products share common parts or modules. There is a tactic sometimes referred to as "delayed differentiation": Decisions about which products will go into production are delayed while standard parts are being produced. When it becomes obvious which items are needed, the system reacts quickly by producing the remaining non-standard parts for those items. Quality is the basic prerequisite for a just-in-time system. It is vital for JIT systems, as poor quality can cause serious disruptions in the production process. The system aims for a smooth workflow; the appearance of problems due to low quality causes failures in this stream.

Since small production lot sizes and the lack of buffer stocks result in minimal WIP, the production process is forced to stop when a problem occurs. However, it cannot resume until the problem is resolved. It is clear that shutting down the entire process is very costly and lowers the planned output, so it is absolutely essential to avoid shutting down the system as much as possible and resolve issues quickly if they occur.

JIT systems use a three-stage approach to quality. The first part is to introduce quality into the product and into the manufacturing process. A high level of quality is achievable because "just-in-time" systems produce standard products, using respectively standard working methods and standard equipment, workers are accustomed to their production operations and know them well. In addition, all the costs of project quality (i.e., the formation of product quality at the design stage) can be spread over many products, while receiving a small unit cost. It is very important to choose the appropriate level of quality in terms of the end user and production capabilities. Thus, product design and process development must go hand in hand.

2. Process development. For "just-in-time" systems, seven aspects of product development are particularly important:

Small production batches

Reduced lead-to-production time

production cells

Limiting the volume of work in progress

Quality improvement

Production flexibility

Small inventories

The small volume of the production lot and the purchase lot provides a number of advantages that allow JIT systems to function efficiently. First, when small production lots move through the system, the amount of work in progress (i.e., materials that are in the process of being processed) is significantly less than with large lots. This reduces the cost of storage, requires less storage space, and does not create unnecessary space occupancy in the workplace. Secondly, when there are quality issues, the cost of inspection and rework is less because there are fewer units in each lot to be checked and reworked. In addition, small batches provide more planning flexibility.

A small production batch and a changing range of products require frequent re-equipment and readjustment of equipment (i.e. preparation for production). If such training cannot be done quickly and relatively inexpensively, time and cost will become inhibitory factors. Often, workers are trained to prepare their equipment for the production process themselves. In addition, special programs are used to reduce the time and cost of preparing for production; while workers become a valuable part of the process.

In addition, to reduce the time and cost of preparation, you can use the grouping of technologies - the union of similar operations. For example, the production of various parts that are similar in shape, material, etc. may require the same type (similar) preparation. Their sequential processing on the same equipment can reduce the necessary changes; only minor adjustment is required.

A common feature of "exact-term" systems is a set of production cells. They combine equipment and tools for processing a group of parts with similar technological requirements. At their core, cells are highly specialized and efficient manufacturing centers. Among the most important advantages of production cells: the transition time to a new type of product is reduced, equipment is used efficiently, it is easier for workers to master related specialties. The combination of high cell efficiency with small production batch sizes results in a minimum work in process.

Continuous quality improvement often aims to find and eliminate all causes of problems.

Just-in-time systems are designed to keep inventory to a minimum. According to the JIT philosophy, holding inventory is a waste of money. Inventory is a kind of buffer that hides recurring problems. These problems are not solved, partly because they are hidden, and partly because having a reserve stock makes them less serious.

Using a JIT approach, inventory levels are gradually lowered to open up problems. When problems are discovered and solved, the level of stocks is lowered again, the next layer of problems is found and solved, and so on.

Personnel organizational elements

There are five personnel and organizational elements that are particularly important for JIT systems.

Workers as an asset

Training of workers in related specialties

Continuous improvement

Accounting

Enterprise / project management

The fundamental principle of the JIT philosophy is to regard workers as the active capital of the enterprise. Well trained and motivated workers are the heart of the system. They have more decision-making power than their counterparts in traditional systems, but accordingly more is expected of them.

Workers are trained in related trades to perform multiple elements of the process and operate a variety of equipment. This gives the system additional flexibility, because workers can help each other when there are "congestions" in the production process or replace an absent colleague.

Workers in a JIT system have a greater responsibility for quality than workers in traditional systems. They are expected to contribute to problem solving in a process of continuous improvement. Workers in JIT systems typically receive extensive training in statistical process control, quality improvement, and problem solving.

Another characteristic feature of "fixed-term systems" is the way in which overhead costs are allocated. Traditional accounting methods sometimes distort the allocation of expenses because they allocate them on the basis of hours directly worked.

Another feature of just-in-time systems has to do with leadership. The manager is required to be a leader and assistant, and not just give orders. Two-way communication between managers and workers is strongly encouraged.

1.4 Production planning and control

Especially important for JIT systems are 5 elements of production management and planning:

Work transfer system.

visual systems.

Close relationships with suppliers.

Reducing the number of transactions and the volume of office work.

The main emphasis in JIT systems is on achieving stable, balanced work schedules. To this end, the main production schedules are designed to ensure an even workload of production facilities.

The terms "pull" and "push" are used to describe two different ways of moving work through the production system. In "push" systems (push system), at the end of work at the production site, the products are pushed to the next site; or, if this operation was the final one, finished products are pushed to the warehouse of final products. In "pull" systems (pull system) management of the movement of work is assigned to the subsequent operation: each work site, as necessary, "attracts" products from the previous site to itself; products from the final operation are "pulled" by the consumer's request or control schedule. Just-in-time systems use a "pull" approach to manage the flow of work, with each job site producing output in response to the demand of the next job site. Traditional manufacturing systems use a "push" approach to push work through the system.

As a rule, just-in-time systems have very close relationships with suppliers who must ensure frequent deliveries of small batches of high-quality products. In a traditional manufacturing system, buyers control the quality of purchased products themselves, checking supply lots for quality and quantity, and returning defective goods back to the supplier for rework and replacement. There is practically no spare time in "precise-term" systems, so low-quality products disrupt the smooth movement of work through the system. Moreover, checking incoming purchases is considered a waste of time because it does not add anything to the cost of the product. For this reason, the responsibility for quality assurance is transferred to suppliers. Buyers work with suppliers to help them achieve the required level of quality and understand the importance of producing products of consistently high quality. The ultimate goal of the buyer is to assign a certificate of conformity to the supplier as a manufacturer of high quality goods. The bottom line is that the supplier can be fully relied upon, with no doubt that his deliveries will meet a certain level of quality and do not need to be checked by the buyer.

Technological changes are the most expensive among all the listed operations. JIT systems reduce costs by reducing the number and frequency of such operations. For example, a supplier delivers products directly to production, completely bypassing warehouses, thereby eliminating the activity associated with placing materials in a warehouse and then moving them to production sites. The endless search for ways to improve quality that permeates the entire JIT system eliminates many of the activities associated with product quality - and the associated costs. The use of bar coding (not just in "precision" systems) helps to reduce data entry operations and increases the accuracy of the data.

1.5 Advantages and disadvantages of JIT technology

From a logistical standpoint, JIT is a fairly simple binary inventory management logic without any restriction on the minimum inventory requirement, according to which MP flows are carefully synchronized with the need set by the production schedule for the release of finished products. Such synchronization is nothing more than the coordination of two functional areas of logistics: supply and production support. In the future, the JIT ideology was successfully promoted in the distribution of products, and at present - in macrologistics systems of various levels and purposes.

The main advantages of just-in-time technologies, which explain their widespread use in logistics practice, are:

Low level of stocks of MR, NP, GP.

Reducing production space.

Improving the quality of products, reducing marriage and rework.

Reducing production time.

Increase flexibility when changing the product range.

Smooth production flow with rare failures caused by quality problems; shorter terms of preparation of the production process; multi-skilled workers who can help or replace each other.

High performance and equipment efficiency.

Participation of workers in solving production problems.

Good relationship with suppliers.

Less non-manufacturing work, such as warehousing and moving materials.

You can also consider specific benefits for buyers and suppliers.

Benefits for the buyer

Close relationships provide an opportunity for dialogue leading to a precise definition of benefits.

Maintaining the lowest level of stocks of raw materials and components.

Cost savings until inventory is needed.

Savings in terms of time and space.

Reducing the cost of security and insurance.

Reducing the likelihood of theft, write-offs and damage.

For wholesalers and retailers - reduction of warehouse space and release of retail space.

Reducing the required vehicle fleet.

Benefits for the supplier

Guaranteed contract.

Obtaining useful information in connection with working in closer contact with the buyer.

Close relationships contribute to the formation of loyalty, trust and the conclusion of long-term contracts.

The main disadvantages of the just-in-time system are:

* the difficulty of ensuring high consistency between the stages of production;

* Significant risk of disruption of production and sale of products.

Likewise, there are disadvantages specifically for buyers and suppliers.

The organization of such systems may require high initial costs for all participants in the logistics supply chain.

Disadvantages for the buyer

Lack of required product.

Increase in cost due to the refusal to purchase large lots.

Problems with delivery and transport associated with the need for frequent transportation.

Disadvantages for the supplier

Payments are distributed over time throughout the duration of the contract.

The probability of erroneous orders when the needs and sales volumes of the buyer change.

Increasing the cost of storage and delivery of goods.

Increase in security and insurance costs.

Also, the disadvantages of the JIT system are the complexity of its implementation and the numerous problems that arise when implementing the concept of "just in time". These issues include:

High initial investment and costs for the implementation of JIT (purchase of high-quality expensive modern equipment, the cost of training specialists and high wages, increased production costs due to small production batches, etc.).

Inability to cope with unforeseen circumstances (breakdowns, strikes of supply workers, etc.);

Dependence on the high quality of the supplied materials.

· The need to work in stable production, although demand often fluctuates.

Decreased flexibility in meeting changing customer needs.

Difficulty in reducing changeover times and related costs.

The inability of individual vendors to work in JIT mode.

Problems of binding JIT to other information systems of partners.

The need to change the overall layout of buildings.

Work of employees in an environment of increased stress.

Lack of spirit of cooperation and trust between employees.

The inability of individual employees to take on greater responsibility.

Chapter 2. Micrologistics systems based on the concept of JIT

2.1 Basic concepts

Micrologistics systems are subsystems, structural components of macrologistics systems. Micrologistics systems cover the scope of an individual enterprise, are built from the standpoint of the strategic goals of firms and optimize the main processes, provide solutions to local issues within the framework of individual functional elements of logistics systems. It can be industrial, trade enterprises, territorial-production complexes.

Logistics systems that use the principles of the concept of "just in time" are "pull" systems (pull systems), in which the placement of orders for the replenishment of stocks of material resources or finished products occurs when their number in certain links of the logistics system reaches a critical level . At the same time, stocks are "pulled" through distribution channels from suppliers of material resources or logistics intermediaries in the distribution system. logistics concept just in time

The pulling system is a production organization system in which parts and semi-finished products are fed to the next technological operation from the previous one as needed.

Here, the central control system does not interfere in the exchange of material flows between different sections of the enterprise, does not set current production targets for them. The production program of a separate technological link is determined by the size of the order of the next link. The central control system sets the task only for the final link of the production technological chain.

2.2 Micrologistics systems

2.2.1 Efficient customer response (ECR) concept

JIT is forcing suppliers to change the way they work to deliver faster, higher quality, smaller batches and absolute reliability. The obvious way to meet these requirements is for vendors themselves to adopt JIT techniques. This ensures that the entire LC will work in concert based on the same goals and principles. The concept of efficient consumer response or ECR involves the expansion of the JIT zone throughout the supply chain. Other names used are quick response (quick response, QR), continuous replenishment planning (CPR). Under ECR conditions, the required materials are communicated back through the supply chain, causing MPs to move forward, i.e. ECR "stretches" MR through the organizations included in the LC.

In 1985, one of the world's first ECR partnerships was formed in the United States, involving retailer J.C. Penney, fabric manufacturer Burlington, and clothing manufacturer Lanier Clothing. As a result, they increased sales by 22% and reduced inventory by 50%.

Great interest in ECR arose in the second half of the 1990s in the grocery industry. Currently, in supermarkets using this approach, when a customer is sold a pack of cookies, the checkout automatically sends a message to the supplier to replace this pack, after which the supplier's system sends a similar signal to its supplier, i.e. this signal goes all the way back. It was within the framework of ECR that the technology of inventories managed by the seller arose (see paragraph 1.3.5).

Necessary conditions for the implementation of the concept of "just in time":

Availability of reliable suppliers in the economic system. For example, American and European manufacturers were able to implement this concept 10-15 years later than the Japanese due to low reliability of supply.

Partnership relationships between organizations in the supply chain.

Use of systems for exchanging information about the required MPs, such as kanban for JIT and electronic data interchange for ECR.

High speed of physical delivery of MR, including by reducing the time of intermediate storage and waiting for cargo handling.

Accurate information about the current state of production, accurate forecasts for the near future. To do this, when organizing and managing production processes, reliable telecommunication systems and information and computer support should be used.

ECR Implementation Challenges

Seasonality in the production of some inputs, such as crops.

Disagreement of some of the LC organizations (does not want or cannot) work in ECR mode - this interrupts the flow.

If the LC crosses a boundary where the MP is slowing down, or encounters other performance-degrading problems, ECR will not work.

2.2.2 In-house KANBAN system

Micrologistic kanban system is one of the first attempts to put the concept of "just in time" into practice.

Japan made its contribution to the development of the global logistics system, which developed and applied for the first time in the world the progressive logistics concept "just in time" - JIT (just in time) and the in-house KANBAN system.

In practice, pulling in-house logistics systems include the KANBAN system (translated from Japanese as a card), developed and implemented by Toyota (Japan).

This system combines the features of a "just in time" system, in particular, a small amount of stock, and separate production units. The systems are most applicable to products that are produced in high volumes on a regular basis. They are much less applicable to expensive or large items that have high storage or shipping costs; systems are less applicable to infrequently and irregularly used products or to manufacturing enterprises that are not divided into small production units.

The KANBAN system does not require a total computerization of production, but it implies a high discipline of deliveries, as well as a high responsibility of the personnel, since the central regulation of the intra-production logistics process is limited. The KANBAN system allows you to significantly reduce inventories.

"Pull" micro-logistics systems such as "KANBAN", eliminating excess stocks, can work effectively only with relatively short production cycles, accurate demand forecasting and some other production and technological conditions. To correct the shortcomings inherent in both systems, attempts were made to combine them in a single planning, production and dispatching computer complex.

The difference between Just-in-time and KANBAN.

Many people confuse or fail to clearly distinguish between Just-in-time and KANBAN. I am sure this simple and small article will help them.

When managing inventory, it is always necessary to remember that excess inventory is not good. It is this philosophy that defines the Just-in-time approach to inventory management. The goal of this approach is to increase return on investment (ROI) by reducing inventories in production and their corresponding costs of building those inventories. One of the key elements in the JIT system is KANBAN. This Japanese word is made up of two words, where KAN means "visual" and BAN means "cards". That is, literally, KANBAN means visual cards. These cards play an important role in the implementation of JIT, because. serve as a kind of traffic lights - visual signals for action. And although JIT and KANBAN are often confused with each other, they are not the same thing. In this case, let's determine how these two related concepts differ.

First, what is JIT? It is a method of enterprise inventory management designed to improve return on investment, efficiency and quality of work by radically reducing inventory levels. Proponents of the JIT method see inventories more as a source of cost, rather than as an additional value, in contrast to supporters of traditional practice. It focuses on having the right material at the right time in the right place and in the right quantities. And, despite some idealism of this approach, it gives companies a number of advantages:

1. It simplifies warehouse material flow, making it more controllable.

2. Deliveries are synchronized with the production plan, storage costs are reduced, flexibility is increased /

3. The production schedule and working hours are tied to production and supply, which reduces the number of overtime and frees up time for staff development.

4. Optimization is achieved by redistributing personnel with a variety of skills to those parts of the process where at that moment there is a need for labor.

5. Finally, special attention is paid to the relationship of the company with its suppliers. There is also a drawback to this strategy - JIT makes suppliers very susceptible to possible fluctuations in demand. Strong and long-term relationships with the supplier make it possible, however, to minimize this disadvantage.

KANBAN is not a stock control system. Rather, it is a planning system that tells the company what to produce, when to produce, and how much to produce. This is a suitable element of implementing the JIT concept. KANBAN is used as a demand indicator that immediately sends a signal throughout the supply chain. Let's look at a specific example of how it works. Suppose one of the components for the production of any device is a 10-inch rod that comes on pallets. Let's say there are 100 rods on a pallet. When the pallet is finished, the assembly worker takes the card that was attached to the pallet and passes it to the core production area. After that, another pallet of rods is produced and sent to the instrument assembly shop. In essence, KANBAN is a pull model of production (from the English “pull” - pull), that is, each card, pallet, basket or box sent to a supplier or component manufacturer reflects the demand for the final product. Essentially, the KANBAN production planning system enables businesses to be reactive to customer needs instead of trying to predict the need.

1. JIT is an inventory management strategy and KANBAN is one of its elements.

2. KANBAN is a demand-based pull model of production, usually in the form of cards, baskets, pallets or boxes.

3. JIT uses KANBAN as a way to reduce inventory management costs. Together they make it possible to obtain "the right material, in the right place, at the right time and in the right quantities."

2.2.3 ORT micrologistics system

One of the most successful examples of synthesis in the production of key elements of MRP and KANBAN based on modern information and computer technologies was the micrologistics system "Optimized Production Tehnology" developed in the early 1980s - ORT (optimized production technology).

The ORT system, developed by Israeli and American specialists, belongs to the class of "pull" micrologistics systems that integrate supply and production processes. The main principle of this system is to identify the so-called "bottlenecks" in the production process (in the original - critical resources). Many experts consider ORT to be a computerized version of KANBAN, with the difference that the ORT system prevents bottlenecks in the logistics network "supply - production", and the KANBAN system allows you to effectively eliminate bottlenecks that have already arisen.

The ORT system carries out automated operational and production planning and dispatching. Computer calculation of production schedules is performed per shift, day, week, etc. The tasks of controlling the shipment of stocks of finished products to consumers, searching for alternative resources, issuing recommendations for full-fledged replacements in the absence of the necessary material resources are also solved. When forming the production schedule, the following criteria are used: the degree of satisfaction of the production need for resources; resource efficiency; funds immobilized in work in progress; flexibility.

The implementation of operational planning and regulation of production in the ORT system is carried out using software and mathematical software built on a modular basis.

To generate a production schedule from the ORT database, files of orders, technological maps, resources, sales forecasts, etc. are used. These files of materials and components are processed in parallel with the data of files of technological maps, as a result of which a technological route is formed, which is processed using a software module, identifying critical resources. As a result, it becomes possible to assess the intensity of resource use and the degree of their utilization and arrange them accordingly. At this stage, the technological route forks. The critical resource branch includes all bottlenecks and subsequent related logistic activities.

The effect of the ORT system from a logistical standpoint is to reduce production and transport costs, reduce inventories of work in progress, reduce the production cycle time, reduce the need for warehouse and production space, and increase the rhythm of shipment of finished products to consumers.

2.2.4 Total Quality Management (TQM)

The goal is to eliminate delays caused by product quality problems. Total quality management includes techniques such as statistical control, quality circles, and fool-proof process design. In TQM, each statement performs three additional actions. First, he checks the quality of the product received from the previous site. Then he controls the quality of his operation. And finally it checks again what it passes to the next one. In case there is a quality problem, the operator must stop the assembly line, and until the problem is solved, production will not resume. These three types of control are the Quality at the source method, which allows you to maintain high quality in production, as well as eliminate downtime at the workplace associated with waiting for inspectors. Thus, each operator is responsible for the "input control" of the products received from the supplier, and the "output control" of what he sends to his customer. This chain ends with an external buyer purchasing a high quality product.

Chapter 3. Practical application of the logical concept of JIT

3.1 Implementation of Just In Time

The Just in Time concept was developed at Toyota factories and is called the Toyota Production System (TPS). Based on the methods used in Ford's mass production, which was based on two main principles: the interchangeability of components and the principle of flow. The first principle made it possible to abandon highly skilled workers, replacing them with unskilled assemblers. The second principle, developed and implemented directly by Ford, was aimed at increasing production efficiency, reducing transportation time and manual labor time by creating specialized product movement paths - conveyors.

Toyota's goal was to adapt Ford's in-line production to meet limited resources and limited demand. As a result, two approaches to the creation of a new system emerged. The first approach was formulated by Taichi Ohno in 1988. In his opinion, "the fundamental doctrine of the Toyota Production System is the elimination of waste." The second ideologue was Shigeo Shingo. For his part, he pointed to the need to organize a high value-added production flow and eliminate such types of waste as overproduction, downtime, transportation, excess inventory, unnecessary non-manufacturing operations and scrap, which reduce the value added in the production process. Together, these two approaches became the philosophical basis of Just in Time.

The implementation of Just in Time provides a number of benefits to increase the competitiveness of the organization. These include: reducing inventory levels, increasing productivity, improving the quality of products or deliveries, reducing delivery times, increasing the flexibility of the company, reducing the production cycle. A statistical report prepared by the US National Manufacturers Association in 1997 shows that among the 385 enterprises studied, 16% who implemented the JIT system achieved the greatest success, and the survey confirmed the readiness of another 53% of companies to switch to this supply system. It is no coincidence that Ford, General Motors, Hewlett-Packard, Intel, Motorola, and many other major manufacturers were among the pioneers of JIT in the United States. It was the introduction of JIT that in many ways allowed these industrial giants to defend their market positions.

3.2 JIT example

The well-known American motorcycle company Harley-Davidson faced increased competition in the 1970s from Japanese companies: Honda, Yamaha, Suzuki and Kawasaki. Most of the previously stable companies in this industry have gone bankrupt. The four Japanese companies were able to ship their motorcycles almost anywhere in the world with higher quality and lower prices than the competition. In 1978, Harley-Davidson tried to prove in court that Japanese companies were selling motorcycles at dumping prices, i.e. below their cost. But during court hearings, it turned out that the operating costs of Japanese companies are 30% lower than those of Harley-Davidson. One of the main reasons for this state of affairs was their use of the JIT mode of operation. So in 1982, Harley-Davidson began developing and implementing a "materials as needed" program, similar to JIT. The company struggled initially, but over 5 years, it reduced changeover times by 75%, reduced warranty and waste costs by 60%, and reduced work-in-progress by $22 million. During the same period, the company's productivity increased by 30% and the company is currently doing well in the market.

3.3 Application of the JIT system in Russia

For the first time, such a system was introduced in the aviation industry (MIC) of the USSR in 1940 with the participation of the new People's Commissar Shakhurin. Prior to this, as in other types of industry in the USSR, work was carried out according to monthly and quarterly plans. With such work, the first two weeks of each month usually went to "clean up" the unfinished last month, and in the last decade an assault began in order to somehow fulfill the plan. For the third decade produced about half of all products. This is at best. And at worst - the case dragged on even more. It was decided to stop this practice, introduce a daily schedule-norm for the delivery of products to the state and strictly adhere to it, since the assault slowed down the main production.

Goals

For any organization seeking to compete in the market, an important advantage is to provide the consumer with the necessary and high-quality product at a lower price in the shortest possible time. Just In Time makes it possible to achieve this by setting and achieving a number of goals:

Zero defects- This goal is aimed at reducing the number of defects in production. In the course of production, not a single, even minor defect should occur.

Zero workpiece setup time- installation time should be minimal. Reducing installation time results in a shorter production cycle and a reduction in inventory in production.

Zero inventory- stocks, including those that are in the process of processing, installation and assembly, should tend to zero.

Zero unnecessary operations- in the JIT system, this means that all activities that do not add value to the product should be excluded from the production process.

Zero waiting time– the waiting time should tend to zero. In this case, the accuracy of production planning and the consistency of work increase.

Key Elements of Just-in-Time

There are several key elements at the heart of a Just-In-Time production management system.

Stable production program. For the Just in Time system to work, it is necessary to create a uniform load of all production and assembly operations. A change in the program should occur only due to a change in demand.
Reducing the time of installation operations. The goal is to achieve "one-touch" machining parts. This can be achieved by optimizing planning, changing production operations or the shape of the workpieces.
Reducing batch sizes (both in production and in purchasing). In order for this element of Just-in-Time to work, it is necessary to achieve closer cooperation with suppliers. More frequent deliveries will be required, so suppliers must ensure reliable and accurate deliveries.
Reduced waiting time (during production and delivery). Reducing waiting times can be achieved by placing equipment closer together, applying batch processing technologies, reducing the length of the processing queue, increasing coordination and consistency between sequential processes. Reduced waiting times for deliveries can be obtained by closer proximity to suppliers.
Carrying out preventive maintenance. Preventive maintenance of equipment should be carried out during periods of downtime or non-working hours.
The use of a "universal" workforce. The Just-In-Time system involves training workers to operate various types of equipment and machinery. This allows workers to carry out maintenance and quality control operations from their workplace. JIT requires the creation of competent production teams who are fully responsible for the results of their work.
Application of the Zero Defects program. For the Just in Time system to work, all actions that lead to defects or defects must be eliminated, because. this system does not provide reserves for their elimination. The implementation of the program makes it possible to achieve personal responsibility of employees for the quality of the work they perform. Also, in the JIT system, each worker should have the right to stop production if a violation of the quality of work is possible.
The use of small batches when moving. To implement this element, the JIT system provides for the use of a signaling system (for example, kanban cards). This ensures the transfer of parts between workstations (production equipment) in small quantities. Ideally, one part should be transferred per unit of time.

Advantages and disadvantages of Just In Time

Just In Time is a system that has been successfully used in many manufacturing plants. Like any production system, JIT has certain advantages and disadvantages. The main advantages of the system Just in time include:

Reducing the cash needed to manage inventory. A smaller amount of stocks reduces the amount of financial resources "frozen" in stocks.
Possibility to use for other needs areas previously allocated for reserves. The Just-In-Time system reduces inventory of raw materials, inventory in production, and inventory of finished goods. As a result, significant areas can be released that can be used for other purposes.
Reducing the volume of unsold goods with a reduction in demand. The goal of the Just-In-Time system is to produce as much product as the customer needs. Therefore, if the demand for products drops sharply, then in the JIT system the amount of unsold goods will be minimal.
Reducing the volume of production batches. This allows you to quickly respond to changing market needs. Due to the small batches in the JIT system, it is possible to introduce changes faster based on customer needs.
Reducing the number of defects, which leads to a reduction in scrap and the cost of its correction. For the system to work effectively Just in time, the number of defects detected in production should tend to zero. To achieve this, a lot of efforts are being made to improve the quality of work.

The most serious and obvious shortcomings of the Just in Time system are:

Decreased ability to correct a marriage that has arisen and missed for the next operation. Because JIT does not provide for stocks and reserves, both material and temporary (or they are minimized), then in the production process it becomes quite difficult to remake or correct the marriage. To correct the marriage, it is necessary to stop all production.
Strong dependence of production on the quality of the work of suppliers. Suppliers are usually outside the company's control, so any problems in the supply chain can cause production to stop.
Few opportunities to meet the sudden increase in demand. Because Since the JIT system does not include stocks of finished goods, additional time is required to meet the increased demand.

Implementation of the Just In Time system

The implementation of the JIT system requires a large and long-term effort from the organization. The key success factors for implementation are:

Support by managers of all levels of management of the organization;
Adequate allocation of resources;
Building long-term, trusting relationships with suppliers;
Changing the corporate culture of the organization;
Changing the flow of processes and principles of organization of production;
Optimization of loading and equipment operation;
Optimization of equipment maintenance in order to reduce the number of breakdowns;
Implementation of quality improvement programs;
Reducing delivery times and increasing their quantity. Implementation of a system of frequent deliveries in small batches;
Implementation of a search, analysis and loss reduction system.

The JIT implementation process is long and labor intensive. For the system to work, it is necessary to apply various methods, tools and quality techniques. But most importantly, it will require a change in the minds of employees and corporate culture.

5. Carrying out preventive maintenance. Preventive maintenance of equipment should be carried out during periods of downtime or non-working hours.

6. The use of a "universal" workforce. The Just-In-Time system involves training workers to operate various types of equipment and machinery. This allows workers to carry out maintenance and quality control operations from their workplace. JIT requires the creation of competent production teams who are fully responsible for the results of their work.

7. Application of the Zero Defects program. For the Just in Time system to work, all actions that lead to defects or defects must be eliminated, because. this system does not provide reserves for their elimination. The implementation of the program makes it possible to achieve personal responsibility of employees for the quality of the work they perform. Also, in the JIT system, each worker should have the right to stop production if a violation of the quality of work is possible.

8. The use of small batches when moving. To implement this element, the JIT system provides for the use of a signaling system (for example, kanban cards). This ensures the transfer of parts between workstations (production equipment) in small quantities. Ideally, one part should be transferred per unit of time.

Advantages and disadvantages of Just in Time

Just in Time is a system that has been successfully applied in many manufacturing plants. Like any production system, JIT has certain advantages and disadvantages. The main advantages of the system Just in time include:

1. Reducing the cash needed to manage inventory. A smaller amount of stocks reduces the amount of financial resources "frozen" in stocks.

2. Possibility to use for other needs the areas previously reserved for reserves. The Just-In-Time system reduces inventory of raw materials, inventory in production, and inventory of finished goods. As a result, significant areas can be released that can be used for other purposes.

3. Reducing the volume of unsold goods with a reduction in demand. The goal of the Just-In-Time system is to produce as much product as the customer needs. Therefore, if the demand for products drops sharply, then in the JIT system the amount of unsold goods will be minimal.

4. Reducing the volume of batches of manufactured products. This allows you to quickly respond to changing market needs. Due to the small batches in the JIT system, it is possible to introduce changes faster based on customer needs.

5. Reducing the number of defects, which leads to a reduction in marriage and the cost of its correction. For the system to work effectively Just in time, the number of defects detected in production should tend to zero. To achieve this, a lot of efforts are being made to improve the quality of work.

The most serious and obvious shortcomings of the Just in Time system are:

1. Decrease in the ability to correct a marriage that has arisen and missed for the next operation. Because JIT does not provide for stocks and reserves, both material and temporary (or they are minimized), then in the production process it becomes quite difficult to remake or correct the marriage. To correct the marriage, it is necessary to stop all production.

2. Strong dependence of production on the quality of work of suppliers. Suppliers are usually outside the company's control, so any problems in the supply chain can cause production to stop.

3. Few opportunities to meet the sudden increase in demand. Because Since the JIT system does not include stocks of finished goods, additional time is required to meet the increased demand.

Implementation of the Just in Time system