Plating, Anodizing & Surface Treatment worked example

Rack Changeover Time at 12% setup, handling, and delay allowance: a worked example

What does the result look like when setup, handling, and delay allowance reaches 12%? The full calculation is worked below with real intermediate numbers. Use it when rack changeover time in plating, anodizing and surface treatment needs a defensible run time before a quote goes out.

The inputs for this scenario

  • Parts to load and unload per rack change: 120 units (unchanged)
  • Racking rate (load/unload): 12 units / min (unchanged)
  • Setup, handling, and delay allowance: 12 % (raised for this scenario; the documented default is 10)

Working through the calculation

  • Applying the documented formula (Base rack changeover time = rack changeover time workload รท rack changeover time completion rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 11.2 hr for required rack changeover time, the number this scenario is built around.
  • At this operating point the engine returns 10 hr for base rack changeover time.
  • At this operating point the engine returns 12 % for rack changeover time allowance applied.
  • At this operating point the engine returns 12 pieces / min for rack changeover time completion rate.

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 1.82% above the baseline at 11.2 hr.
  • A figure at this level is achievable when setup, handling, and delay allowance is genuinely sustained, not just peaked for a shift. It models a steady racking rate; awkward part geometry, contact reconditioning, or double-racking will lengthen real changeovers beyond the estimate.

Results at a glance

  • Required rack changeover time: 11.2 hr (headline result)
  • Base rack changeover time: 10 hr
  • Rack changeover time allowance applied: 12 %
  • Rack changeover time completion rate: 12 pieces / min

Run it with your numbers

  • Every input above is editable in the live Rack Changeover Time calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.