Measurement, Test & Control Equipment worked example

Returned Unit Diagnostic Time at 23% intermittent fault and nff allowance: a worked example

This scenario runs the returned unit diagnostic time calculation on the strong side: 23% intermittent fault and nff allowance, with every other input held at its documented default. Use when planning repair depot staffing, estimating turnaround time for RMA units, or budgeting diagnostic labor for warranty returns of test and measurement equipment.

The inputs for this scenario

  • Units awaiting diagnosis: 35 units (unchanged)
  • Average diagnostic time per unit: 90 min / unit (unchanged)
  • Intermittent fault and NFF allowance: 23 % (raised for this scenario; the documented default is 20)

Working through the calculation

  • Applying the documented formula (Base diagnostic time = units awaiting diagnosis x average diagnostic time per unit) to the inputs above produces each figure below.
  • At this operating point the engine returns 0.48 hr for total diagnostic time (hours), the number this scenario is built around.
  • At this operating point the engine returns 0.39 hr for base diagnostic time (hours).
  • At this operating point the engine returns 23 % for intermittent fault allowance (hours).
  • At this operating point the engine returns 90 pieces / min for diagnostic rate (units/min).

How this compares with the baseline

  • Against the tool's baseline example, where intermittent fault and nff allowance sits at 20% and the headline result is 0.47 hr, this scenario comes in 2.5% above the baseline at 0.48 hr.
  • Use it when planning repair-cell staffing, committing to RMA turnaround times, or sizing the effort to clear a returns backlog. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Total diagnostic time (hours): 0.48 hr (headline result)
  • Base diagnostic time (hours): 0.39 hr
  • Intermittent fault allowance (hours): 23 %
  • Diagnostic rate (units/min): 90 pieces / min

Run it with your numbers

  • Every input above is editable in the live Returned Unit Diagnostic Time calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.