S&OP, Demand Planning & Forecasting worked example

Forecast Accuracy at 68% target forecast accuracy rate: a worked example in s&op, demand planning & forecasting

Here is what the math looks like when conditions slip. We hold every other input steady and drop target forecast accuracy rate to 68%, then walk the calculation through step by step. Estimate forecast accuracy 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

  • Forecast periods hit within tolerance: 8 count (held at the documented default)
  • Total forecast periods evaluated: 250 count (held at the documented default)
  • Target forecast accuracy rate: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

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

How this compares with the baseline

  • Against the tool's baseline example, where target forecast accuracy rate 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 forecast accuracy rate, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. A single hit-rate hides magnitude of error and directional bias, so pair it with MAPE and forecast bias before drawing conclusions.

Results at a glance

  • Forecast accuracy rate: 3.2 % (headline result)
  • Forecast accuracy gap to target: 64.8 points
  • Forecast accuracy count: 8 count
  • Total forecast accuracy population: 250 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Forecast Accuracy calculator, set target forecast accuracy rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.