Eyewear, Lenses & Vision Products worked example

Coating Chamber Utilization at 65% target chamber utilization: a worked example

This worked example runs the coating chamber utilization numbers for a tougher week than the baseline: 65% target chamber utilization instead of the typical 90%. Calculate how much of available coating chamber capacity is occupied by planned lens coating runs.

The inputs for this scenario

  • Loaded coating positions: 420 lens positions (held at the documented default)
  • Usable chamber capacity: 500 lens positions (held at the documented default)
  • Target chamber utilization: 65 % (the input this scenario stresses; the baseline uses 90)

Working through the calculation

  • The calculation starts from the formula this tool documents: Coating chamber utilization = loaded coating positions ÷ usable chamber capacity × 100.
  • Coating chamber utilization works out to 84 % at these inputs, and this is the headline figure for the scenario.
  • Utilization shortfall to target works out to -19 points at these inputs.
  • Loaded coating positions works out to 420 lens positions at these inputs.
  • Usable chamber capacity works out to 500 lens positions at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target chamber utilization sits at 90% and the headline result is 84 %, this scenario lands almost exactly on the baseline at 84 %.
  • Use it when planning coating batch loads, reviewing per-run economics, or deciding whether to hold a partial batch for more substrates before committing a deposition cycle. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Coating chamber utilization: 84 % (headline result)
  • Utilization shortfall to target: -19 points
  • Loaded coating positions: 420 lens positions
  • Usable chamber capacity: 500 lens positions

Run it with your numbers

  • To rerun this with your own numbers, open the live Coating Chamber Utilization calculator, set target chamber utilization to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.