Desalination & Membrane Water Treatment Equipment worked example

Membrane Skid Assembly Labor at 12% fit-up, test, and rework allowance: a worked example

Push fit-up, test, and rework allowance up to 12% and the picture changes. This example computes every intermediate figure at that operating point. Use it when membrane skid assembly labor in desalination and membrane water treatment equipment is changing rate or allowance and you want to see the impact.

The inputs for this scenario

  • Skid assembly work packages: 120 packages (unchanged)
  • Assembly completion pace: 12 packages / hr (unchanged)
  • Fit-up, test, and rework allowance: 12 % (raised for this scenario; the documented default is 10)

Working through the calculation

  • Applying the documented formula (Base skid assembly hours = skid assembly work packages รท assembly completion pace) to the inputs above produces each figure below.
  • At this operating point the engine returns 11.2 hr for required skid assembly labor hours, the number this scenario is built around.
  • At this operating point the engine returns 10 hr for base skid assembly hours.
  • At this operating point the engine returns 12 % for fit-up, test, and rework allowance.
  • At this operating point the engine returns 12 pieces / min for assembly completion pace.

How this compares with the baseline

  • Against the tool's baseline example, where fit-up, test, and rework allowance sits at 10% and the headline result is 11 hr, this scenario comes in 1.82% above the baseline at 11.2 hr.
  • It computes the labor hours to assemble a membrane skid from its work-package count, scaled by an allowance for fit-up, testing, and rework. 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

  • Required skid assembly labor hours: 11.2 hr (headline result)
  • Base skid assembly hours: 10 hr
  • Fit-up, test, and rework allowance: 12 %
  • Assembly completion pace: 12 pieces / min

Run it with your numbers

  • Every input above is editable in the live Membrane Skid Assembly Labor calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.