Advanced Planning, Scheduling & APS worked example

Machine Load Balance at 13% setup and queue allowance: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop setup and queue allowance to 13%, then walk the calculation through step by step. Estimate machine hours needed to absorb planned load using scheduled operations, machine throughput, and balancing allowance.

The inputs for this scenario

  • Scheduled machine load: 960 operations or pieces (held at the documented default)
  • Machine throughput rate: 4.8 operations/min (held at the documented default)
  • Setup and queue 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 machine processing time = scheduled machine load รท machine throughput.
  • Balanced machine-hour requirement works out to 226 machine hr at these inputs, and this is the headline figure for the scenario.
  • Base machine processing time works out to 200 machine hr at these inputs.
  • Setup and queue allowance works out to 13 % at these inputs.
  • Machine throughput works out to 4.8 operations/min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where setup and queue allowance sits at 18% and the headline result is 236 machine hr, this scenario comes in 4.24% below the baseline at 226 machine hr.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to setup and queue allowance, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It uses a single average throughput rate, so a work center running a wide mix of fast and slow parts will be mis-sized unless you segment the load by part family.

Results at a glance

  • Balanced machine-hour requirement: 226 machine hr (headline result)
  • Base machine processing time: 200 machine hr
  • Setup and queue allowance: 13 %
  • Machine throughput: 4.8 operations/min

Run it with your numbers

  • To rerun this with your own numbers, open the live Machine Load Balance calculator, set setup and queue allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.