Outdoor Power Equipment worked example

Inventory Coverage with component daily usage of 1,300 units / day: a worked example in outdoor power equipment

What does the result look like when component daily usage reaches 1,300 units / day? The full calculation is worked below with real intermediate numbers. a planner needs to size component stock so the build line does not stop waiting on engines, cells, or castings

The inputs for this scenario

  • Component daily usage: 1,300 units / day (raised for this scenario; the documented default is 500)
  • Supplier lead time: 30 days (unchanged)
  • Component safety stock: 1,500 units (unchanged)

Working through the calculation

  • Applying the documented formula (Lead-time demand = component daily usage × supplier lead time) to the inputs above produces each figure below.
  • At this operating point the engine returns 0.03 units for protected days of supply, the number this scenario is built around.
  • At this operating point the engine returns 43.33 days for unprotected days.
  • At this operating point the engine returns 1,300 pieces for inventory.
  • At this operating point the engine returns 30 pieces / day for daily usage.

How this compares with the baseline

  • Against the tool's baseline example, where component daily usage sits at 500 units / day and the headline result is 0.01 units, this scenario comes in 160% above the baseline at 0.03 units.
  • A figure at this level is achievable when component daily usage is genuinely sustained, not just peaked for a shift. It assumes steady daily usage and a fixed lead time, so it underprotects against demand spikes or supplier delays unless those are already baked into the safety stock figure.

Results at a glance

  • Protected days of supply: 0.03 units (headline result)
  • Unprotected days: 43.33 days
  • Inventory: 1,300 pieces
  • Daily usage: 30 pieces / day

Run it with your numbers

  • Every input above is editable in the live Inventory Coverage calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.