QMS, CAPA & Quality System Management worked example

Complaint Handling Cost at 69% share of complaints requiring formal investigation: a worked example in qms, capa & quality system management

What does the result look like when share of complaints requiring formal investigation reaches 69%? The full calculation is worked below with real intermediate numbers. A quality manager sizes the cost of running the complaint-handling process to benchmark it against complaint-reduction projects.

The inputs for this scenario

  • Customer complaints received in period: 140 complaints (unchanged)
  • Investigation cost per complaint: 280 $/complaint (unchanged)
  • Share of complaints requiring formal investigation: 69 % (raised for this scenario; the documented default is 60)
  • Fixed complaint-system overhead: 4,500 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Total complaint cost = complaints x investigation cost x investigation share + system overhead) to the inputs above produces each figure below.
  • At this operating point the engine returns 31,548 $ for total complaint handling cost, the number this scenario is built around.
  • At this operating point the engine returns 225 $ / piece for complaint handling cost per unit.
  • At this operating point the engine returns 27,048 $ for variable complaint handling cost.
  • At this operating point the engine returns 4,500 $ for fixed complaint handling cost adder.

How this compares with the baseline

  • Against the tool's baseline example, where share of complaints requiring formal investigation sits at 60% and the headline result is 28,020 $, this scenario comes in 12.59% above the baseline at 31,548 $.
  • A figure at this level is achievable when share of complaints requiring formal investigation is genuinely sustained, not just peaked for a shift. It uses a single average investigation cost; a handful of severe recalls or regulatory complaints can cost many multiples of the average and are not captured by a flat per-complaint rate.

Results at a glance

  • Total complaint handling cost: 31,548 $ (headline result)
  • Complaint handling cost per unit: 225 $ / piece
  • Variable complaint handling cost: 27,048 $
  • Fixed complaint handling cost adder: 4,500 $

Run it with your numbers

  • Every input above is editable in the live Complaint Handling Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.