S&OP, Demand Planning & Forecasting worked example

Demand Plan Attainment at 68% target attainment rate for the demand plan: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop target attainment rate for the demand plan to 68%, then walk the calculation through step by step. Estimate demand plan attainment for sandop, demand planning and forecasting using production-ready inputs so teams can track KPI performance and decide whether corrective action is needed.

The inputs for this scenario

  • Periods where demand plan was met within tolerance: 8 count (held at the documented default)
  • Total planning periods evaluated: 250 count (held at the documented default)
  • Target attainment rate for the demand plan: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: Demand plan attainment rate = demand plan attainment count ÷ total demand plan attainment population × 100.
  • Demand plan attainment rate works out to 3.2 % at these inputs, and this is the headline figure for the scenario.
  • Demand plan attainment gap to target works out to 64.8 points at these inputs.
  • Demand plan attainment count works out to 8 count at these inputs.
  • Total demand plan attainment population works out to 250 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target attainment rate for the demand plan sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to target attainment rate for the demand plan, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. A hit/miss rate ignores the size of each miss, so a plan that barely misses many periods can score the same as one that misses badly on a few.

Results at a glance

  • Demand plan attainment rate: 3.2 % (headline result)
  • Demand plan attainment gap to target: 64.8 points
  • Demand plan attainment count: 8 count
  • Total demand plan attainment population: 250 count

Run it with your numbers

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

Last reviewed 2026-05-12.