Precision Springs, Stampings & Micro-Formed Components worked example

Inventory Coverage with on-hand finished parts inventory of 600 units / day: a worked example in precision springs, stampings & micro-formed components

Here is what the math looks like when conditions slip. We hold every other input steady and drop on-hand finished parts inventory to 600 units / day, then walk the calculation through step by step. Estimate inventory coverage for precision springs, stampings and micro-formed components using production-ready inputs so teams can plan replenishment and safety stock using actual usage and lead time.

The inputs for this scenario

  • On-hand finished parts inventory: 600 units / day (the input this scenario stresses; the baseline uses 1,200)
  • Average daily shipment/consumption rate: 85 days (held at the documented default)
  • Safety-stock coverage multiplier: 1.1 units (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Inventory coverage cycle stock = inventory coverage daily usage × inventory coverage 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 on-hand finished parts inventory 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.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to on-hand finished parts inventory, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes steady, level daily usage; a part with lumpy or seasonal demand can stock out inside the reported days even when average coverage looks comfortable.

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 Inventory Coverage calculator, set on-hand finished parts inventory to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.