Just in time
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Mr. Taiichi Ohno introduced the Just-In-Time (JIT) system. [1] JIT is more than just an inventory reduction system, it is also about reducing changeover times and modernizing factories. [2] JIT means that the right parts arrive at the assembly line at the exact time they are needed and only in the necessary amounts. Kanban is the method used to convey information about production orders to ensure smooth workflow. The goal of JIT is cost reduction through the absolute elimination of waste. Takt time establishes the rate of production to match customer demand.
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1. Just-in-time (JIT) production aims to eliminate waste by producing goods only as needed, thereby reducing inventory costs and improving productivity.
2. JIT was pioneered by Toyota in the 1950s and became widely adopted in Japanese manufacturing by the 1970s before spreading to other countries.
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Jit principles
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Just-in-time (JIT) manufacturing aims to eliminate waste by producing the right goods, in the right quantities, at the right time. This minimizes inventory and improves efficiency. JIT was developed in Japan in the 1970s at Toyota and focuses on continuous improvement. It requires close coordination between all parts of the production process and supply chain. While very effective, JIT provides less buffering against disruptions and requires more stable demand than traditional approaches.
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The document discusses Just-in-Time (JIT) production. It defines JIT as a system that produces or acquires materials only as needed to minimize waste and costs. JIT was developed by Toyota and aims to eliminate overproduction and waste. The document outlines the purposes, objectives, advantages, disadvantages and characteristics of JIT manufacturing and services.
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1. Just-in-time (JIT) production aims to eliminate waste by producing goods only as needed, thereby reducing inventory costs and improving productivity.
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Just-in-Time (JIT) manufacturing is a philosophy developed by Toyota to eliminate waste and continuously improve productivity. It aims to reduce inventory costs by producing and delivering only what is needed for production. Taiichi Ohno at Toyota first implemented JIT in 1950. By reducing setup times and minimizing inventory, JIT strives to improve return on investment. General Electric and other companies adopted JIT principles in the 1980s under different names. JIT goals include eliminating disruptions, increasing flexibility and productivity, and delivering what customers want when they want it at lowest cost. Key steps involve introducing optimized production speeds, reducing stock to zero inventory, and designing plants and processes to avoid stoppages.
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- Key aspects of JIT include a pull-based production system controlled through kanban signals, small lot sizes, low setup times, continuous flow, and close partnerships with suppliers. Implementing JIT exposes problems in production so they can be addressed, improving quality over time. It requires stable production schedules and reliable equipment and processes.
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The document provides information about Toyota Motors, including that it was established in 1937 in Japan and became the world's largest automaker in 2008. It also discusses Just-in-Time (JIT) manufacturing, noting that JIT aims to minimize waste and inventory by timing the arrival of parts just as they are needed in the production process. Key aspects of JIT discussed include kanban systems and milk run delivery concepts.
Lean_Manufacturing___Just-in-Time.ppt
1. Lean manufacturing focuses on eliminating waste throughout the production process through techniques like just-in-time production and pull systems.
2. A pull system controls production using signals like kanban cards to produce only what is needed and eliminates waste from long lead times and excess inventory.
3. The Toyota Production System pioneered lean techniques and its goals of continuously eliminating waste and improving processes while respecting people.
Lean Manufacturing
When a student asks you to explain Lean Mfg, it requires a simple way of explaining.
By giving examples, pictures and case studies, each Lean philosophy can be explained.
Lean in the real Lean sense.
Lean Production With Jaguar Example
Lean production is a Japanese approach that focuses on eliminating waste to increase efficiency. It aims to strip out non-value adding activities like excess inventory. Key aspects include just-in-time production where materials are delivered as needed to avoid excess stock, total quality management to reduce defects, and time-based management to reduce lead times through flexible production. Simultaneous engineering involves cross-functional teams to speed new product development.
Just in time (jit) and lean production
Slides contain the concept of Just in Time and Lean production Systems which lead to eliminate kinds of wasting in order to increase the quality of product to match customers' needs.
Report on JIT , for Projects and Seminars
Report on just in time with case study on gravity flow racks material.
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Or Whatsapp +919860865423
15 lean mfg toyota production system (1)
The document discusses key aspects of Lean Manufacturing and the Toyota Production System. It defines Lean as eliminating waste to continuously improve productivity. The Toyota Production System aims to reduce lead times through just-in-time production and autonomation (Jidoka). It emphasizes a pull-based system, continuous flow, and eliminating overproduction and waiting through techniques like kanban cards, poka-yoke, and standardized processes. The system respects people and helps suppliers continuously improve as well.
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Just in time
- 2. JUST IN TIME(JIT) JIT is much more than an inventory reducing system JIT is much more than reducing change over time JIT is much more than modernizing the factory
- 3. Mr. Ohno says: Making a factory operate for the company just like human body operates for an individual. We should have a system in a factory that automatically responds when problem occurs.
- 4. JIT means that in a flow process, the right parts needed in assembly reach the assembly line at the right time they are needed and only in the amount needed. Approach: ZERO Inventory.
- 5. Problem: 1.Upset in Production 2. Mistake in paperwork 3.Defective products & rework 4.Trouble with equipment 5.Absenteeism etc. Result of Waste: 1.Huge inventory 2.Less Productivity 3.Less profitability
- 6. Piller of TPS JIT- Absolute elimination of waste Autonomation - Automation with a human touch
- 7. KANBAN is the means used for conveying information about picking up or receiving the production order TPS is supported by JIT system
- 8. KANBAN method by which the TPS moves smoothly Give the machine Intelligence 1. By automatic checking system 2. By prevent automatically 3. By automatic stopping device 4. By safety device 5. By fixed position stopping 6. By full work system 7. By foolproofing system
- 9. GOAL of JUST IN TIME Cost Reduction
- 10. Focus of Japanese Industry 1.Establishing a production flow of one machine one operator. 2.One operator many machine in different process
- 11. The power of individual skill and teamwork : 1. Implementing autonomation is up to the managers & supervisors 2. To adopt the simple movement of the human operator to the autonomation machine
- 12. 5 Why : Complete Waste analysis Present capacity = work + waste
- 13. Type of Waste 1. Over production 2. Time on hand ( waiting ) 3. Transportation 4. Processing itself 5. Stock on hand ( inventory ) 6. Movement 7. Making defective product
- 14. Philosophy First principle – My Plant (Owner the work area)
- 15. What is TAKT time ? “TAKT” is the German word for the baton that an orchestra conductor uses to regulate the speed, beat or timing at which musicians play. So Takt time is Beat time / Rate time / heart Beat. Means the time that a complete product is finished Exmp: If you have a Takt time of two minutes that means every two minutes a complete product , assembly or machine is produced off the line
- 16. How is TAKT time established? The Customers buying rate establishes Takt time. It’s the rate at which the customer buys your product. So this means that over the course of a day , week , month or year the customer s you sell to are buying at a rate of Takt time. If you can’t predict when and how much a customer will buy, then your Takt time shuold change. Your Production staffing should be set accordingly.
- 17. Imbalances in Takt time Producing to takt time with optimal staffing is where you want to be. Where you have the right amount of people to produce your product within your established Takt time. The operators cycle times are loaded to Takt time. Imbalances in Takt time, especially in older facilities, drive security, one step on “the lean journey”is to monitor Summed Takt time in order to move toward preventive (rather than reactive) quality measures. That is , if you can defect , contain and correct a problem within Takt + Buffer time(Summed Takt) then you have taken a step toward Error Proofing. This is no substitute for continuously improving a balanced Takt time ( thereby eliminating security inventory/buffering)but, rather ,it is a first step which you can institute quickly and economically.
- 18. TAKT time Calculation : 1.Input the demand(daily, weekly, monthly etc.) 2.Determine the gross available time in a shift 3.List all the deduction and the corresponding time 4.No.of shift to calculate the total available seconds 5.Takt time is calculated as a function of available time divided by the demand
- 19. Example 1.Demand (Daily/Weekly/Monthly): 100 units 2.Available time(Daily gross availability /shift) : 480 minutes 3.Deduction to shift availability Description Time Tea break 10 min. Lunch 30 min. Miscellaneous(M/H) 10min Total 50min 4.Net availability / shift (2-3) : (480-50)*60 Sec = 25800 Seconds. 5.Prod.Requirement(Takt time) : Total availability(25800)/Demand(100) = 258 sec/unit
- 20. Necessity is the mother of invention Automation Skill & Talent of Individuals Control Overproduction Prevent Defect free Product Visual Control( Management By Sight)