Quality worked example

Warranty Return Rate with shipped units of 212,500 units: a worked example in quality

Push shipped units up to 212,500 units and the picture changes. This example computes every intermediate figure at that operating point. Use when field failures or returns need a clear rate and cost impact.

The inputs for this scenario

  • Shipped units: 212,500 units (raised for this scenario; the documented default is 85,000)
  • Returned units: 140 units (unchanged)
  • Average claim cost: 62 $ / claim (unchanged)
  • Annual shipped volume: 120,000 units / yr (unchanged)

Working through the calculation

  • Applying the documented formula (Return rate = returned units รท shipped units) to the inputs above produces each figure below.
  • At this operating point the engine returns 0.07 % for return rate, the number this scenario is built around.
  • At this operating point the engine returns 659 PPM for return ppm.
  • At this operating point the engine returns 8,680 $ for warranty cost.
  • At this operating point the engine returns 4,902 $ / yr for annual exposure.

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 60% below the baseline at 0.07 %.
  • It calculates return rate and return PPM from shipped and returned units, the warranty cost for the returns, and projected annual warranty exposure at the same rate. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Return rate: 0.07 % (headline result)
  • Return PPM: 659 PPM
  • Warranty cost: 8,680 $
  • Annual exposure: 4,902 $ / yr

Run it with your numbers

  • Every input above is editable in the live Warranty Return Rate calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.