Industrial Equipment, Machinery & Capital Goods worked example

Assembly Labor Load at 21% material handling and fit-up allowance: a worked example

What does the result look like when material handling and fit-up allowance reaches 21%? The full calculation is worked below with real intermediate numbers. Use it when planning fitters, electricians, mechanical assemblers, and technicians for machine or skid assembly.

The inputs for this scenario

  • Assembly work packages: 64 packages (unchanged)
  • Assembly completion throughput: 2.4 packages / hr (unchanged)
  • Material handling and fit-up allowance: 21 % (raised for this scenario; the documented default is 18)

Working through the calculation

  • Applying the documented formula (Base assembly labor time = assembly work packages รท assembly completion throughput) to the inputs above produces each figure below.
  • At this operating point the engine returns 32.27 hr for required assembly labor load, the number this scenario is built around.
  • At this operating point the engine returns 26.67 hr for base assembly labor time.
  • At this operating point the engine returns 21 % for material handling and fit-up allowance.
  • At this operating point the engine returns 2.4 pieces / min for assembly completion throughput.

How this compares with the baseline

  • Against the tool's baseline example, where material handling and fit-up allowance sits at 18% and the headline result is 31.47 hr, this scenario comes in 2.54% above the baseline at 32.27 hr.
  • A figure at this level is achievable when material handling and fit-up allowance is genuinely sustained, not just peaked for a shift. A single throughput rate assumes packages of similar size; one oversized weldment or a tight-tolerance fit-up can consume far more than the average implies.

Results at a glance

  • Required assembly labor load: 32.27 hr (headline result)
  • Base assembly labor time: 26.67 hr
  • Material handling and fit-up allowance: 21 %
  • Assembly completion throughput: 2.4 pieces / min

Run it with your numbers

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

Last reviewed 2026-05-12.