S&OP, Demand Planning & Forecasting worked example

Inventory Projection Accuracy at 68% target projection accuracy rate: a worked example

This worked example runs the inventory projection accuracy numbers for a tougher week than the baseline: 68% target projection accuracy rate instead of the typical 95%. Estimate inventory projection 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

  • Inventory projections within tolerance: 8 count (held at the documented default)
  • Total inventory projections evaluated: 250 count (held at the documented default)
  • Target projection 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: Inventory projection accuracy rate = inventory projection accuracy count ÷ total inventory projection accuracy population × 100.
  • Inventory projection accuracy rate works out to 3.2 % at these inputs, and this is the headline figure for the scenario.
  • Inventory projection accuracy gap to target works out to 64.8 points at these inputs.
  • Inventory projection accuracy count works out to 8 count at these inputs.
  • Total inventory projection accuracy population works out to 250 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target projection accuracy rate sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • Use it in a monthly planning review to grade projection reliability and track it against an accuracy target over time. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

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

Run it with your numbers

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

Last reviewed 2026-05-12.