Before you start: Understand work in progress, throughput and consistent time units.
Try it
A stable system completes five items per day and averages 20 items in progress. What average cycle time does Little’s law imply?
Your reasoning, assumptions and units:
Apply it to your work
Describe a comparable situation. What evidence would you need before using this reasoning to make a decision?
Your example and next check:
Answer and reasoning
Cycle time = WIP ÷ throughput = 20 ÷ 5 = 4 days, using a consistent system boundary and stable long-run averages. It is not a promise for every individual item.
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