What to do about chaotic workshop management, and how to implement lean production?

Lean manufacturing is not only a production method aimed at minimizing the resources used in production and reducing management and operating costs, but it is also a philosophy and a culture. Most companies have already recognized the importance of lean manufacturing to their businesses.

What is lean manufacturing?

Lean manufacturing is a concept developed by experts from the Digital International Automotive Program at MIT in Japan.“ToyotaJITProduction methods”The term "精" (jing) is a term of praise, meaning "refined" or "efficient," referring to the production of only the necessary quantity of products that the market (or the next process) urgently needs, without investing in excessive production factors; and "益" (yi) means that all business activities should be beneficial and effective, and economical.

Lean manufacturing is currently the best production organization system and method in the industrial sector.

The four characteristics of lean production

Lean production can improve a company's production efficiency to a certain extent and enhance its competitiveness. However, although many companies want to implement lean management, they haven't truly understood one of the key characteristics of lean production. So, what are the characteristics of lean production management??

1Eliminate all waste and strive for excellence.

The characteristics of lean manufacturing are the elimination of all waste, the pursuit of excellence, and continuous improvement. Its core is streamlining, eliminating everything useless in the production process. This involves streamlining all non-value-added work in product development, design, production, and management, aiming to respond to market demands with the best quality, lowest cost, and highest efficiency.

2Emphasizing the role of people and giving full play to their potential

Lean manufacturing shifts the maximum amount of work tasks and responsibility to workers who directly add value to the product. Tasks are assigned to small teams, where workers collaborate. This requires workers to be proficient in multiple tasks, reduces the number of workers not directly adding value, and increases worker autonomy in production. When a production line malfunctions, workers have the right to independently decide to stop the machine, investigate the cause, and make decisions. Teamwork expands the scope of workers' work, stimulates their interest and innovation, and further facilitates the implementation of lean manufacturing.

3Zero waste goal

Inventory is"Root of the trouble"High inventory is a characteristic of mass production. Due to factors such as unstable equipment operation, unreasonable process scheduling, high scrap rates, and uneven production, untimely delivery often occurs, making inventory a necessity."buffer"。

However, lean manufacturing views inventory as a fundamental element of the enterprise."scourge"The main reason is:

①Inventory increases operating costs;

②Inventory masked the company's problems.

4The pursuit of perfection, never being satisfied.

Lean production methods, on the other hand,"The endless pursuit of perfection"As a business objective, the pursuit of continuous improvement in product quality, cost, and service is a key characteristic that distinguishes lean production from mass production and is the driving force behind its success. Just-in-Time (JIT) production methods...JIT) and continuous improvement processes (CIPThis embodies the lean manufacturing philosophy of pursuing perfection.

Lean manufacturing strives for rational and efficient production, and seeks production and management technologies that can flexibly and diversely produce high-quality products to meet various needs. Its basic principles and many methods have positive significance for the manufacturing industry.

The 10 Tools of Lean Manufacturing

1Just-in-time production(JIT)

Just-in-time (JIT) production originated in Japan, and its basic idea is...“Produce the required products only when needed and in the required quantity.”The core of this production method is to pursue a zero-inventory production system, or a production system that minimizes inventory. During production operations, we must strictly adhere to standard requirements, produce only what is needed on-site, and deliver materials only as required to prevent inventory discrepancies.

2、5SWith visual management

5S(Sort, straighten, sweep, clean, and sustain) are effective tools for on-site visual management, and also effective tools for improving employee quality.5SThe key to success is standardization. By establishing detailed on-site standards and clear responsibilities, employees are first and foremost required to maintain a clean and tidy work environment. This allows them to identify and resolve issues related to the work environment and equipment, thereby gradually cultivating standardized and disciplined professional habits and good professional ethics.

3Kanban Management

Kanban is a means of exchanging production management information within a factory. Kanban cards contain a considerable amount of information and can be reused. There are two common types of kanban: production kanban and transportation kanban. Kanban is relatively direct, readily visible, and easy to manage.

4Standardized operations (SOP）

Standardization is the most effective management tool for achieving high production efficiency and quality. After value stream analysis, the production process is standardized into written standards based on scientific technological processes and operating procedures. These standards not only serve as the basis for judging product quality but also as the basis for training employees in standardized operations. These standards include on-site visual standards, equipment management standards, product production standards, and product quality standards. Lean production requires…“Everything must be standardized”。

5Total Production Maintenance(TPM)

By involving all employees, we create well-designed equipment systems, improve the utilization rate of existing equipment, achieve safety and high quality, and prevent malfunctions, thereby enabling enterprises to reduce costs and improve overall production efficiency. This not only reflects energy...5SMore importantly, it involves job safety analysis and safety production management.

6Use value stream mapping to identify waste.VSM）

The production process is rife with staggering waste; value stream mapping(Value StreamMapping)It is the foundation and key to implementing lean systems and eliminating process waste.:

??Identify where waste occurs during the process and recognize opportunities for lean improvement;

??Understanding the components and importance of the value stream;

??Mastering practical drawing“Value Stream Mapping”Ability;

??Understand the application of data in value stream mapping and improve the ordering of opportunities through data quantification.

7Production line balancing design

An irrational assembly line layout leads to unnecessary movement of production workers, reducing production efficiency. Inappropriate motion scheduling and process routes cause workers to repeatedly pick up or put down workpieces. Therefore, assessment and on-site planning are crucial. Saving time and effort is paramount. Achieving maximum efficiency with minimum effort is essential.

8, stimulate production (PULL）

Pull production refers to the use of Kanban management as a means to achieve...“Material selection”That is, the subsequent process is based on“market”Production is required, and the same amount of work-in-process is taken from the previous process to meet the shortage in this process, thus forming a pull control system for the entire process, ensuring that not a single product is produced beyond the required quantity.JITIt requires a pull production system as its foundation, and pull system operation is a typical characteristic of lean manufacturing. The zero inventory pursued by lean is mainly achieved through the pull system operation method.

9Quick switching (BLACKSMITH）

The theory behind rapid switchover is based on operations research and concurrent engineering, with the aim of minimizing equipment downtime through teamwork. When changing production lines or adjusting equipment, it significantly reduces lead times, resulting in a very noticeable effect of rapid switchover.

To minimize downtime waste, reducing setup time involves gradually eliminating and reducing all non-value-adding activities and transforming them into processes that can be completed without downtime. Lean manufacturing is achieved through specific requirements such as continuously eliminating waste, reducing inventory, reducing defects, and shortening manufacturing cycle time. Reducing setup time is one of the key methods to help us achieve this goal.

10Continuous improvement(Kaizen)

The miracle begins when you start to accurately identify value, recognize the value stream, make the steps that create value for a particular product flow continuously, and allow customers to pull value from the enterprise.

Implementation steps of lean manufacturing tools

The steps listed here are for reference only, because implementing lean production requires conducting on-site research and diagnosis of the enterprise, and then establishing targeted implementation steps based on the actual situation on-site.

Step 1: On-site5SActivity;

Step 2: Kanban Management;

Step 3: Value Stream Analysis;

Step 4: Standardized operations;

Step 5: Pull production;

Step 6:JITProduction;

Step 7: Balance production;

Step 8: Quick Switch;?

Step 9:TPMmanage;

Step 10: Continuous improvement.

The four core ideas of lean production are: ...”value perspective“(Value), continuous improvement, customer-centricity, maximizing company profits.(Flawless)。