ERP & MRP Planning worked example

Master Production Schedule Load with planned order quantity of 430 units: a worked example

Suppose planned order quantity falls to 430 units. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate MPS load hours from planned order quantity, standard hours per unit, model-mix factor, and setup/load multiplier.

The inputs for this scenario

  • Planned order quantity: 430 units (the input this scenario stresses; the baseline uses 850)
  • Standard routing hours per unit: 1.6 hr / unit (held at the documented default)
  • Model mix or complexity factor: 1.08 x (held at the documented default)
  • Setup and planning multiplier: 1.12 x (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: MPS load hours = planned order quantity × standard routing hours per unit × model mix factor × setup and planning multiplier.
  • Master production schedule load hours works out to 832 hr at these inputs, and this is the headline figure for the scenario.
  • MPS load before setup multiplier works out to 743 hr at these inputs.
  • Setup and planning multiplier works out to 1.12 x at these inputs.
  • Planned quantity × standard hours works out to 688 hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where planned order quantity sits at 850 units and the headline result is 1,645 hr, this scenario comes in 49.41% below the baseline at 832 hr.
  • It converts a planned order quantity into total schedule load hours by applying standard routing time, a model-mix or complexity factor, and a setup-and-planning multiplier. 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

  • Master production schedule load hours: 832 hr (headline result)
  • MPS load before setup multiplier: 743 hr
  • Setup and planning multiplier: 1.12 x
  • Planned quantity × standard hours: 688 hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Master Production Schedule Load calculator, set planned order quantity to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.