Lean Manufacturing & Operations worked example

Schedule Attainment Rate at 68% target attainment rate: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop target attainment rate to 68%, then walk the calculation through step by step. Calculate schedule attainment as a percentage by comparing actual completed units to the planned production schedule for a given period.

The inputs for this scenario

  • Actual units completed: 185 units (held at the documented default)
  • Planned (scheduled) units: 200 units (held at the documented default)
  • Target attainment rate: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: Schedule Attainment = (Actual / Planned) x 100.
  • Schedule attainment rate (%) works out to 92.5 % at these inputs, and this is the headline figure for the scenario.
  • Gap to target attainment works out to -24.5 points at these inputs.
  • Actual units completed works out to 185 count at these inputs.
  • Planned units works out to 200 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target attainment rate sits at 95% and the headline result is 92.5 %, this scenario lands almost exactly on the baseline at 92.5 %.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to target attainment rate, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. Attainment counts volume against plan but ignores quality, mix accuracy, and whether the right SKUs were built — a unit made early or to the wrong order can still inflate the rate.

Results at a glance

  • Schedule attainment rate (%): 92.5 % (headline result)
  • Gap to target attainment: -24.5 points
  • Actual units completed: 185 count
  • Planned units: 200 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Schedule Attainment Rate calculator, set target attainment rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.