Lean Manufacturing & Operations worked example
Little's Law WIP Calculator with throughput rate of 130 units/day: a worked example
This scenario runs the little's law wip calculator calculation on the strong side: throughput rate of 130 units/day, with every other input held at its documented default. Use this calculator to predict what WIP level will result from a given throughput and lead time, or to verify that your WIP target is consistent with your flow goals.
The inputs for this scenario
- Throughput rate: 130 units/day (raised for this scenario; the documented default is 50)
- Average lead time: 4 days (unchanged)
- Adjustment factor: 1 x (unchanged)
Working through the calculation
- Applying the documented formula (WIP = Throughput x Lead Time x Adjustment Factor) to the inputs above produces each figure below.
- At this operating point the engine returns 520 units for predicted wip level (units), the number this scenario is built around.
- At this operating point the engine returns 520 value for base product.
- At this operating point the engine returns 1 x for multiplier.
- At this operating point the engine returns 520 value for factor a x b.
How this compares with the baseline
- Against the tool's baseline example, where throughput rate sits at 50 units/day and the headline result is 200 units, this scenario comes in 160% above the baseline at 520 units.
- Use it to set WIP caps, validate observed inventory against flow, or estimate the WIP implied by a target lead time before changing the line. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.
Results at a glance
- Predicted WIP level (units): 520 units (headline result)
- Base product: 520 value
- Multiplier: 1 x
- Factor A x B: 520 value
Run it with your numbers
- Every input above is editable in the live Little's Law WIP Calculator calculator, which recalculates instantly and can be shared with the inputs intact.
Last reviewed 2026-05-12.