Hydrogen Electrolyzer & Fuel Cell Manufacturing worked example

End-of-Line Test Utilization at 22% stack docking, leak verify, and undocking allowance: a worked example

This worked example runs the end-of-line test utilization numbers for a tougher week than the baseline: 22% stack docking, leak verify, and undocking allowance instead of the typical 30%. Estimate end-of-line test bench utilization in hours per stack from polarization-curve sweep length, the test bench sweep rate (test points or current steps per minute), and a setup-and-changeover allowance.

The inputs for this scenario

  • Polarization-curve test points per stack: 24 points (held at the documented default)
  • Bench sweep rate: 1 points / min (held at the documented default)
  • Stack docking, leak verify, and undocking allowance: 22 % (the input this scenario stresses; the baseline uses 30)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base end-of-line test time = test points รท sweep rate.
  • Required end-of-line test time per stack works out to 29.28 hr at these inputs, and this is the headline figure for the scenario.
  • Base end-of-line test time per stack works out to 24 hr at these inputs.
  • Stack docking and leak-verify allowance works out to 22 % at these inputs.
  • Bench sweep rate works out to 1 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where stack docking, leak verify, and undocking allowance sits at 30% and the headline result is 31.2 hr, this scenario comes in 6.15% below the baseline at 29.28 hr.
  • Use it when sizing EOL bench count, finding the line throughput ceiling, or estimating test labor for a new stack program. 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

  • Required end-of-line test time per stack: 29.28 hr (headline result)
  • Base end-of-line test time per stack: 24 hr
  • Stack docking and leak-verify allowance: 22 %
  • Bench sweep rate: 1 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live End-of-Line Test Utilization calculator, set stack docking, leak verify, and undocking allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.