S&OP, Demand Planning & Forecasting worked example

Demand Plan Attainment at 99% target attainment rate for the demand plan: a worked example

What does the result look like when target attainment rate for the demand plan reaches 99%? The full calculation is worked below with real intermediate numbers. Use it when demand plan attainment 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

  • Periods where demand plan was met within tolerance: 8 count (unchanged)
  • Total planning periods evaluated: 250 count (unchanged)
  • Target attainment rate for the demand plan: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

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

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 %.
  • A figure at this level is achievable when target attainment rate for the demand plan is genuinely sustained, not just peaked for a shift. 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: 95.8 points
  • Demand plan attainment count: 8 count
  • Total demand plan attainment population: 250 count

Run it with your numbers

  • Every input above is editable in the live Demand Plan Attainment calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.