Desalination & Membrane Water Treatment Equipment worked example

Leak Test Capacity at 65% expected test-stand uptime: a worked example in desalination & membrane water treatment equipment

Suppose expected test-stand uptime falls to 65%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Forecast how many membrane skids, pressure vessels, piping modules, or valve assemblies can complete leak testing in the available test window.

The inputs for this scenario

  • Assemblies tested per leak-test cycle: 4 assemblies / cycle (held at the documented default)
  • Leak-test cycles available in the period: 480 cycles (held at the documented default)
  • Expected test-stand uptime: 65 % (the input this scenario stresses; the baseline uses 90)
  • First-pass leak-test yield: 97 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross leak-test capacity = assemblies tested per cycle × available leak-test cycles.
  • Forecast passed leak-test capacity works out to 1,211 units at these inputs, and this is the headline figure for the scenario.
  • Gross leak-test capacity works out to 1,920 units at these inputs.
  • Leak-test uptime capacity loss works out to 672 units at these inputs.
  • Leak-test rework capacity loss works out to 37.44 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where expected test-stand uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 27.78% below the baseline at 1,211 units.
  • It computes forecast passed leak-test capacity by multiplying assemblies-per-cycle and available cycles into gross capacity, then derating for test-stand uptime and first-pass yield. 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

  • Forecast passed leak-test capacity: 1,211 units (headline result)
  • Gross leak-test capacity: 1,920 units
  • Leak-test uptime capacity loss: 672 units
  • Leak-test rework capacity loss: 37.44 units

Run it with your numbers

  • To rerun this with your own numbers, open the live Leak Test Capacity calculator, set expected test-stand uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.