Quality worked example

Warranty Return Rate with shipped units of 42,500 units: a worked example in quality

Here is what the math looks like when conditions slip. We hold every other input steady and drop shipped units to 42,500 units, then walk the calculation through step by step. Calculate return rate, warranty cost per shipped unit, and annual warranty exposure.

The inputs for this scenario

  • Shipped units: 42,500 units (the input this scenario stresses; the baseline uses 85,000)
  • Returned units: 140 units (held at the documented default)
  • Average claim cost: 62 $ / claim (held at the documented default)
  • Annual shipped volume: 120,000 units / yr (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Return rate = returned units รท shipped units.
  • Return rate works out to 0.33 % at these inputs, and this is the headline figure for the scenario.
  • Return PPM works out to 3,294 PPM at these inputs.
  • Warranty cost works out to 8,680 $ at these inputs.
  • Annual exposure works out to 24,508 $ / yr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where shipped units sits at 85,000 units and the headline result is 0.16 %, this scenario comes in 100% above the baseline at 0.33 %.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to shipped units, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. Returns lag shipments, so a period's rate mixes units shipped across many prior months; it understates true field failure until returns fully mature.

Results at a glance

  • Return rate: 0.33 % (headline result)
  • Return PPM: 3,294 PPM
  • Warranty cost: 8,680 $
  • Annual exposure: 24,508 $ / yr

Run it with your numbers

  • To rerun this with your own numbers, open the live Warranty Return Rate calculator, set shipped units to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.