Aerospace & Defense Manufacturing worked example

Nonconformance Disposition Time at 61% engineering and customer approval allowance: a worked example in aerospace & defense manufacturing

This worked example runs the nonconformance disposition time numbers for a tougher week than the baseline: 61% engineering and customer approval allowance instead of the typical 85%. Estimate MRB disposition hours from nonconformance records, review pace, and engineering or customer approval allowance.

The inputs for this scenario

  • Open NCRs awaiting MRB disposition: 42 NCRs (held at the documented default)
  • MRB disposition review pace: 0.45 NCRs/min (held at the documented default)
  • Engineering and customer approval allowance: 61 % (the input this scenario stresses; the baseline uses 85)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base MRB review time = nonconformance records รท disposition review pace.
  • Total nonconformance disposition time works out to 150 MRB hr at these inputs, and this is the headline figure for the scenario.
  • Base MRB review time works out to 93.33 MRB hr at these inputs.
  • Engineering and customer approval allowance works out to 61 % at these inputs.
  • Disposition review pace works out to 0.45 NCRs/min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where engineering and customer approval allowance sits at 85% and the headline result is 173 MRB hr, this scenario comes in 12.97% below the baseline at 150 MRB hr.
  • Use it when sizing MRB capacity, forecasting backlog burn-down, or quoting disposition turnaround in a corrective-action plan or supplier audit response. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Total nonconformance disposition time: 150 MRB hr (headline result)
  • Base MRB review time: 93.33 MRB hr
  • Engineering and customer approval allowance: 61 %
  • Disposition review pace: 0.45 NCRs/min

Run it with your numbers

  • To rerun this with your own numbers, open the live Nonconformance Disposition Time calculator, set engineering and customer approval allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.