JIT And Lean Systems Flashcards
What is just-in-time?
Production system in which processing and movement of parts/modules/work-in-progress occurs as they are needed, usually in small batches
Operating concept designed to eliminate waste
Standards for many industries
Key elements: jit manufacturing, total quality management, respect for people
Views waste as something that does not add value
What is lean production
Philosophy of waste reduction and continuous improvement
An intergrated management system that emphasizes in the elimination of waste and continuous improvement of operations
Began at toyota
What are the 3 phases of lean production?
Increase flexibility, smooth the flow, continuously improve
What is the pull production system
Lean use pull (traditional uses push)
Last workstation in the production line requests the precise amounts of materials required
What is Kanban
Japanese: signal, card, or visible record
Card or other device that communicates demand for work or materials from the proceeding station
Paperless prod control system. Authority to pull based on following factors: number of containers, demand rate at the withdraw station, lead time from supply station, container size, safety stock
What is the small lots?
Minimize inventory that hides problems
Suppliers deliver directly to the production floor
Ship completed units as soon as they are ready
Organization focuses on small production lot sizes (low whip inventory)
What is quality at the source (kaizen)
Continuous improvement
Improvements on many aspects: production flows, work conditions, quality, delivery, safety, environment
Raises the bar of quality control
What are some lean tool examples?
Uniform plant loading
Value stream mapping
Reality check
poke yoke
What is uniform plant loading
Smoothing the production flow to dampen schedule variation
Materials pulled into final assembly at constant rate
Heijunka
What is value stream mapping?
A visual tool to systematically examine the flow of material and information. Helps uncover improvement opportunities by identifying:
- bottlenecks
- where errors occur
-which processes have more variations
- where waste occurs
What are the benefits of lean production?
Reduction in manufacturing cycle time
Reduction in inventory
Reduction in labour cost
Minimization of accident
Reduction in space requirements
What are the drawbacks of lean production?
Difficult to maintain discipline
Not best choice for high volume repetitive items
