Industrial Sensors & Instrumentation worked example

Instrument Assembly Labor at 13% setup and in-process inspection allowance: a worked example in industrial sensors & instrumentation

Suppose setup and in-process inspection allowance falls to 13%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate total assembly labor hours for a batch of instruments including mechanical assembly, wiring, potting or encapsulation, and in-process inspection.

The inputs for this scenario

  • Instruments to assemble: 75 units (held at the documented default)
  • Average assembly time per instrument: 22 min / unit (held at the documented default)
  • Setup and in-process inspection allowance: 13 % (the input this scenario stresses; the baseline uses 18)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base assembly time = instruments to assemble x average assembly time (converted to hours).
  • Total assembly labor (hours) works out to 3.85 hr at these inputs, and this is the headline figure for the scenario.
  • Base assembly time (hours) works out to 3.41 hr at these inputs.
  • Setup and inspection allowance works out to 13 % at these inputs.
  • Assembly rate (units/min) works out to 22 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where setup and in-process inspection allowance sits at 18% and the headline result is 4.02 hr, this scenario comes in 4.24% below the baseline at 3.85 hr.
  • It computes total assembly labor hours by converting per-unit build time across the quantity and inflating it by a setup and inspection allowance. 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

  • Total assembly labor (hours): 3.85 hr (headline result)
  • Base assembly time (hours): 3.41 hr
  • Setup and inspection allowance: 13 %
  • Assembly rate (units/min): 22 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Instrument Assembly Labor calculator, set setup and in-process inspection allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.