Plating, Anodizing & Surface Treatment worked example

Rack Changeover Time at 7.2% setup, handling, and delay allowance: a worked example

Suppose setup, handling, and delay allowance falls to 7.2%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate rack changeover time for plating, anodizing and surface treatment using production-ready inputs so teams can plan labor hours, schedule the work, or check whether the job fits the available shift time.

The inputs for this scenario

  • Parts to load and unload per rack change: 120 units (held at the documented default)
  • Racking rate (load/unload): 12 units / min (held at the documented default)
  • Setup, handling, and delay allowance: 7.2 % (the input this scenario stresses; the baseline uses 10)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base rack changeover time = rack changeover time workload รท rack changeover time completion rate.
  • Required rack changeover time works out to 10.72 hr at these inputs, and this is the headline figure for the scenario.
  • Base rack changeover time works out to 10 hr at these inputs.
  • Rack changeover time allowance applied works out to 7.2 % at these inputs.
  • Rack changeover time completion rate works out to 12 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where setup, handling, and delay allowance sits at 10% and the headline result is 11 hr, this scenario comes in 2.55% below the baseline at 10.72 hr.
  • It computes the labor time to unload and reload a plating rack, base handling time plus a setup and delay allowance. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Required rack changeover time: 10.72 hr (headline result)
  • Base rack changeover time: 10 hr
  • Rack changeover time allowance applied: 7.2 %
  • Rack changeover time completion rate: 12 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Rack Changeover Time calculator, set setup, handling, and delay allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.