Outdoor Power Equipment worked example

Inventory Coverage with component daily usage of 250 units / day: a worked example in outdoor power equipment

Suppose component daily usage falls to 250 units / day. This page works the full calculation at that level so you can see exactly which result moves and by how much. Size the component stock to hold from daily usage, supplier lead time, and a safety buffer for engines, cells, and purchased parts.

The inputs for this scenario

  • Component daily usage: 250 units / day (the input this scenario stresses; the baseline uses 500)
  • Supplier lead time: 30 days (held at the documented default)
  • Component safety stock: 1,500 units (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Lead-time demand = component daily usage × supplier lead time.
  • Protected days of supply works out to 0.01 units at these inputs, and this is the headline figure for the scenario.
  • Unprotected days works out to 8.33 days at these inputs.
  • Inventory works out to 250 pieces at these inputs.
  • Daily usage works out to 30 pieces / day at these inputs.

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 50% below the baseline at 0.01 units.
  • It computes lead-time demand and the total component stock required to cover that demand plus a safety buffer. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Protected days of supply: 0.01 units (headline result)
  • Unprotected days: 8.33 days
  • Inventory: 250 pieces
  • Daily usage: 30 pieces / day

Run it with your numbers

  • To rerun this with your own numbers, open the live Inventory Coverage calculator, set component daily usage to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.