Nuclear & Critical Infrastructure Manufacturing worked example

Configuration Control Effort at 23% review board and record update allowance: a worked example

This scenario runs the configuration control effort calculation on the strong side: 23% review board and record update allowance, with every other input held at its documented default. Use it when a wave of engineering change notices needs processing and you need an honest estimate of configuration control hours before they back up.

The inputs for this scenario

  • Engineering change notices to process: 35 change notices (unchanged)
  • Change notices processed per hour: 3 change notices / hr (unchanged)
  • Review board and record update allowance: 23 % (raised for this scenario; the documented default is 20)

Working through the calculation

  • Applying the documented formula (Base configuration control hours = engineering change notices to process รท change notices processed per hour) to the inputs above produces each figure below.
  • At this operating point the engine returns 14.35 hr for required configuration control hours, the number this scenario is built around.
  • At this operating point the engine returns 11.67 hr for base configuration control hours.
  • At this operating point the engine returns 23 % for review board and record update allowance applied.
  • At this operating point the engine returns 3 change notices / hr for change notices processed per hour.

How this compares with the baseline

  • Against the tool's baseline example, where review board and record update allowance sits at 20% and the headline result is 14 hr, this scenario comes in 2.5% above the baseline at 14.35 hr.
  • Use it when planning CCB staffing, quoting a configuration management scope, or forecasting how long an ECN backlog will take to clear after a design freeze or modification campaign. 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

  • Required configuration control hours: 14.35 hr (headline result)
  • Base configuration control hours: 11.67 hr
  • Review board and record update allowance applied: 23 %
  • Change notices processed per hour: 3 change notices / hr

Run it with your numbers

  • Every input above is editable in the live Configuration Control Effort calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.