S&OP, Demand Planning & Forecasting worked example

Inventory Projection Accuracy at 99% target projection accuracy rate: a worked example

What does the result look like when target projection accuracy rate reaches 99%? The full calculation is worked below with real intermediate numbers. Use it when inventory projection accuracy in s and op, demand planning and forecasting needs a clean rate and gap-to-target you can put on a tier board.

The inputs for this scenario

  • Inventory projections within tolerance: 8 count (unchanged)
  • Total inventory projections evaluated: 250 count (unchanged)
  • Target projection accuracy rate: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (Inventory projection accuracy rate = inventory projection accuracy count ÷ total inventory projection accuracy population × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.2 % for inventory projection accuracy rate, the number this scenario is built around.
  • At this operating point the engine returns 95.8 points for inventory projection accuracy gap to target.
  • At this operating point the engine returns 8 count for inventory projection accuracy count.
  • At this operating point the engine returns 250 count for total inventory projection accuracy population.

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 %.
  • A figure at this level is achievable when target projection accuracy rate is genuinely sustained, not just peaked for a shift. A single accuracy rate hides where the misses concentrated; a portfolio can hit target overall while critical A-items project poorly, so segment before trusting the aggregate.

Results at a glance

  • Inventory projection accuracy rate: 3.2 % (headline result)
  • Inventory projection accuracy gap to target: 95.8 points
  • Inventory projection accuracy count: 8 count
  • Total inventory projection accuracy population: 250 count

Run it with your numbers

  • Every input above is editable in the live Inventory Projection Accuracy calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.