Fastening, Torque & Joint Assembly worked example

Fastener Inventory Days at 68% line-side inventory availability: a worked example

Suppose line-side inventory availability falls to 68%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate usable fastener kit coverage for assembly from pieces per kit, planned kits, line-side availability, and usable inventory yield.

The inputs for this scenario

  • Fasteners per kit or line-side container: 500 pieces / kit (held at the documented default)
  • Planned kits or containers available: 12 kits (held at the documented default)
  • Line-side inventory availability: 68 % (the input this scenario stresses; the baseline uses 95)
  • Usable fastener inventory yield: 98 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross staged fasteners = fasteners per kit × planned kits.
  • Good output capacity works out to 3,998 units at these inputs, and this is the headline figure for the scenario.
  • Gross staged fasteners works out to 6,000 units at these inputs.
  • Availability loss works out to 1,920 units at these inputs.
  • Inventory yield loss works out to 81.6 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where line-side inventory availability sits at 95% and the headline result is 5,586 units, this scenario comes in 28.42% below the baseline at 3,998 units.
  • It computes the usable fastener coverage by taking the gross staged count and applying line-side availability and usable inventory yield. 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

  • Good output capacity: 3,998 units (headline result)
  • Gross staged fasteners: 6,000 units
  • Availability loss: 1,920 units
  • Inventory yield loss: 81.6 units

Run it with your numbers

  • To rerun this with your own numbers, open the live Fastener Inventory Days calculator, set line-side inventory availability to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.