Tooling, Fixtures, Dies & Mold Economics worked example

Tool Crib Inventory with average perishable tools consumed per day of 600 units / day: a worked example

Suppose average perishable tools consumed per day falls to 600 units / day. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate tool crib inventory for tooling, fixtures, dies and mold economics using production-ready inputs so teams can plan replenishment and safety stock using actual usage and lead time.

The inputs for this scenario

  • Average perishable tools consumed per day: 600 units / day (the input this scenario stresses; the baseline uses 1,200)
  • Supplier replenishment lead time: 85 days (held at the documented default)
  • Safety stock buffer multiplier: 1.1 units (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Tool crib inventory cycle stock = tool crib inventory daily usage × tool crib inventory lead time.
  • Protected days of supply works out to 6.42 days at these inputs, and this is the headline figure for the scenario.
  • Unprotected days works out to 7.06 days at these inputs.
  • Inventory works out to 600 pieces at these inputs.
  • Daily usage works out to 85 pieces / day at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where average perishable tools consumed per day sits at 1,200 units / day and the headline result is 12.83 days, this scenario comes in 50% below the baseline at 6.42 days.
  • It converts on-hand tool inventory into protected days of supply given daily consumption, replenishment lead time and a safety-stock 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: 6.42 days (headline result)
  • Unprotected days: 7.06 days
  • Inventory: 600 pieces
  • Daily usage: 85 pieces / day

Run it with your numbers

  • To rerun this with your own numbers, open the live Tool Crib Inventory calculator, set average perishable tools consumed per day to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.