Aerospace & Defense Manufacturing worked example

CMM Inspection Capacity at 63% cmm machine uptime: a worked example

This worked example runs the cmm inspection capacity numbers for a tougher week than the baseline: 63% cmm machine uptime instead of the typical 88%. Estimate accepted CMM inspection capacity from features per program cycle, available CMM cycles, uptime, and first-pass inspection yield.

The inputs for this scenario

  • CMM checks per program cycle: 95 checks/cycle (held at the documented default)
  • Available CMM program cycles: 28 cycles (held at the documented default)
  • CMM machine uptime: 63 % (the input this scenario stresses; the baseline uses 88)
  • Accepted first-pass inspection yield: 92 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross CMM capacity = checks per cycle × available CMM cycles.
  • Accepted CMM inspection capacity works out to 1,542 accepted CMM checks at these inputs, and this is the headline figure for the scenario.
  • Gross CMM inspection capacity works out to 2,660 accepted CMM checks at these inputs.
  • CMM downtime loss works out to 984 accepted CMM checks at these inputs.
  • Inspection reject or rerun loss works out to 134 accepted CMM checks at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where cmm machine uptime sits at 88% and the headline result is 2,154 accepted CMM checks, this scenario comes in 28.41% below the baseline at 1,542 accepted CMM checks.
  • Use it for inspection capacity planning, bottleneck analysis, and justifying a second CMM or added metrology shift. 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

  • Accepted CMM inspection capacity: 1,542 accepted CMM checks (headline result)
  • Gross CMM inspection capacity: 2,660 accepted CMM checks
  • CMM downtime loss: 984 accepted CMM checks
  • Inspection reject or rerun loss: 134 accepted CMM checks

Run it with your numbers

  • To rerun this with your own numbers, open the live CMM Inspection Capacity calculator, set cmm machine uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.