Push and Pull Production Systems - The Magic of Pull
4 important questions on Push and Pull Production Systems - The Magic of Pull
How does a WIP cap in pull reduce manufacturing costs?
Since releases are choked off text-decorationbefore the system can get overloaded, costs related to "undo" this overloading (such as expediting, overtime and engineering changes) are minimized.
Why does Kanban achieves less variable cycle times than a pure push system?
Since cycle time increases with WIP level (Little's law), and kanban prevents WIP explosion, it is also prevents cycle time explosions.
1: How is low variability a prerequisite for pull?
2: How is low variability an effect of pull?
1: By limiting the WIP, th system is more vulnerable to variability ("water and rocks" analogy), so low variability is a prerequisite for pull to work well.
2: By putting a WIP cap, WIP & CT explosions are prevented, which leads to less variable cycle times.
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Which main five operational benefits are often attributed to pull?
- reduced manufacturing costs
- reduced variability
- improved quality
- high flexibility
- the ability to (slightly) work ahead (when all goes well)
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