Nuclear & Critical Infrastructure Manufacturing worked example

Configuration Control Effort at 14% review board and record update allowance: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop review board and record update allowance to 14%, then walk the calculation through step by step. Estimate the labor hours needed to process engineering changes and maintain configuration control for nuclear and critical infrastructure work, so configuration teams can plan staffing.

The inputs for this scenario

  • Engineering change notices to process: 35 change notices (held at the documented default)
  • Change notices processed per hour: 3 change notices / hr (held at the documented default)
  • Review board and record update allowance: 14 % (the input this scenario stresses; the baseline uses 20)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base configuration control hours = engineering change notices to process รท change notices processed per hour.
  • Required configuration control hours works out to 13.3 hr at these inputs, and this is the headline figure for the scenario.
  • Base configuration control hours works out to 11.67 hr at these inputs.
  • Review board and record update allowance applied works out to 14 % at these inputs.
  • Change notices processed per hour works out to 3 change notices / hr at these inputs.

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 5% below the baseline at 13.3 hr.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to review board and record update allowance, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes a single steady processing rate; safety-significant changes that trigger 10 CFR 50.59 evaluations or independent verification can take far longer than the average and should be estimated separately.

Results at a glance

  • Required configuration control hours: 13.3 hr (headline result)
  • Base configuration control hours: 11.67 hr
  • Review board and record update allowance applied: 14 %
  • Change notices processed per hour: 3 change notices / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Configuration Control Effort calculator, set review board and record update allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.