Finishing worked example

Powder Inventory Days with powder on hand of 600 lb: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop powder on hand to 600 lb, then walk the calculation through step by step. Calculate days of powder supply by color or material from inventory, daily usage, and safety factor.

The inputs for this scenario

  • Powder on hand: 600 lb (the input this scenario stresses; the baseline uses 1,200)
  • Average powder usage: 85 lb / day (held at the documented default)
  • Safety factor: 1.1 x (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Days of supply = inventory on hand รท daily usage.
  • 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 powder on hand sits at 1,200 lb 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 powder on hand, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes steady average usage; a big blanket order or a color changeover can spike daily draw and make the protected days optimistic.

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 Powder Inventory Days calculator, set powder on hand to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.