ERP & MRP Planning worked example

Manufacturing Lead Time with queue and wait time of 10 days: a worked example

Push queue and wait time up to 10 days and the picture changes. This example computes every intermediate figure at that operating point. a master scheduler needs realistic internal lead time for promise dates and MRP offsets

The inputs for this scenario

  • Queue and wait time: 10 days (raised for this scenario; the documented default is 4)
  • Setup and run time: 6 days (unchanged)
  • Inspection, test, or hold time: 2 days (unchanged)
  • Move, release, and staging time: 1 days (unchanged)

Working through the calculation

  • Applying the documented formula (Manufacturing lead time = queue time + setup/run time + inspection/hold time + move/release time) to the inputs above produces each figure below.
  • At this operating point the engine returns 19 days for total manufacturing lead time, the number this scenario is built around.
  • At this operating point the engine returns 10 days for queue and wait time.
  • At this operating point the engine returns 6 days for setup and run time.
  • At this operating point the engine returns 3 days for inspection, move, and release time.

How this compares with the baseline

  • Against the tool's baseline example, where queue and wait time sits at 4 days and the headline result is 13 days, this scenario comes in 46.15% above the baseline at 19 days.
  • It sums queue/wait, setup and run, inspection/hold, and move/release time into a single internal manufacturing lead time in days. 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

  • Total manufacturing lead time: 19 days (headline result)
  • Queue and wait time: 10 days
  • Setup and run time: 6 days
  • Inspection, move, and release time: 3 days

Run it with your numbers

  • Every input above is editable in the live Manufacturing Lead Time calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.