Just-in-Time/Lean Production. A repetitive production system in which the processing and movement of materials and goods occur just as they are needed!. Pre-JIT: Traditional Mass Production. Post-JIT: “Lean Production”. Tighter coordination along the supply chain Goods are pulled along
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A repetitive production system
in which the processing and movement of materials and goods occur
just as they are needed!
Tighter coordination along the supply chain
Goods are pulled along
— only make and ship what is needed
Waste is ‘anything other than the minimum amount of equipment, materials, parts, space, and worker’s time, which are absolutely essential to add value to the product.’
— Shoichiro Toyoda President, Toyota
Uses simple visual signals to control production
Workcenter B uses parts produced by Workcenter A
How can we control the flow of materials so that B always
has parts and A doesn’t overproduce?
When a container is opened by Workcenter B, its kanban card is removed and sent back to Workcenter A.
This is a signal to Workcenter A to produce another box of parts.
Empty box sent back. Signal to pull another full box into
Question: How many kanban cards here? Why?
y = number of kanban cards
D = demand per unit of time
T = lead time
C = container capacity
X = fudge factor
Largest integer that divides evenly into daily requirement is 10:
A: 40 / 10 = 4
B: 40 / 10 = 4
C: 10 / 10 = 1
Mixed model sequence: A-B-A-B-A-B-A-B-C
What about automation?