Plating, Anodizing & Surface Treatment worked example

Bath Life Estimate at 99% bath availability uptime: a worked example

Push bath availability uptime up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it when bath life estimate in plating, anodizing and surface treatment is being asked to take on more work and you need to know if there is room.

The inputs for this scenario

  • Parts finished per bath turnover: 4 units / cycle (unchanged)
  • Turnovers available before dump: 480 cycles (unchanged)
  • Bath availability uptime: 99 % (raised for this scenario; the documented default is 90)
  • First-pass finish yield: 97 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross bath life estimate capacity = bath life estimate output per cycle × available bath life estimate cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,844 units for good bath life estimate capacity, the number this scenario is built around.
  • At this operating point the engine returns 1,920 units for gross bath life estimate capacity.
  • At this operating point the engine returns 19.2 units for bath life estimate downtime loss.
  • At this operating point the engine returns 57.02 units for bath life estimate yield loss.

How this compares with the baseline

  • Against the tool's baseline example, where bath availability uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 10% above the baseline at 1,844 units.
  • It computes the good parts a bath delivers over its life by scaling gross capacity (parts per turnover times turnovers) down by uptime and first-pass yield. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Good bath life estimate capacity: 1,844 units (headline result)
  • Gross bath life estimate capacity: 1,920 units
  • Bath life estimate downtime loss: 19.2 units
  • Bath life estimate yield loss: 57.02 units

Run it with your numbers

  • Every input above is editable in the live Bath Life Estimate calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.