Push and Pull Production Systems - Comparisons of CONWIP with Kanban
7 important questions on Push and Pull Production Systems - Comparisons of CONWIP with Kanban
Consider figure 10.9. Which trade-off have been made?
Name two differences between kanban and CONWIP with regard to cards.
1: With kanban you have to set multiple card counts (one or two per station) and you only have to set one with CONWIP.
2: Kanban cards are part number-specific. CONWIP cards are line-specific.
What would be the logical choice for a pull system for a company where demand is very seasonable (i.e. a lot of variety in products or product families on the same line), kanban or CONWIP?
CONWIP. It is more suited to a changing part mix because of line-specific cards and a release list.
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What is the I/O interface?
It is the point at which flows shift from make-to-stock to make-to-order.
Where is the I/O interface in a pure make-to-stock environment?
Where is it in a pure make-to-order environment?
In MTS: at the customer/finished goods inventory (all the way downstream)
In MTO: at the raw materials inventory (all the way upstream)
Which 3 factors are key in determining the place of the I/O interface?
- need for speed
- process characteristics
- product proliferation
Sandy is going to marry soon. She can go to a store and buy a wedding dress or she can have one made at a tailor. What's the difference in the location of the I/O interface and why are they exactly there?
The I/O interface of the store is very much near the end of the 'line' (the wedding dress can usually be altered just a bit to make it fit well). The I/O interface of the tailor is pretty much at the start of the 'line'.
The store has a much smaller lead time, but the tailor offers more flexibility and product variety (proliferation).
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