Advanced Planning, Scheduling & APS worked example

Bottleneck Schedule Impact at 99% bottleneck-attributable share: a worked example

Push bottleneck-attributable share up to 99% and the picture changes. This example computes every intermediate figure at that operating point. a capacity planner needs to quantify the schedule exposure created by a bottleneck work center

The inputs for this scenario

  • Overloaded bottleneck hours: 42 constraint hr (unchanged)
  • Impact per constrained hour: 210 $ / constraint hr (unchanged)
  • Bottleneck-attributable share: 99 % (raised for this scenario; the documented default is 90)
  • Recovery setup or expedite cost: 1,200 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Constraint-attributable impact = overloaded bottleneck hours × impact per constrained hour × bottleneck-attributable share) to the inputs above produces each figure below.
  • At this operating point the engine returns 9,932 $ bottleneck impact for bottleneck schedule impact, the number this scenario is built around.
  • At this operating point the engine returns 236 $ / constraint hr for impact per constrained hour.
  • At this operating point the engine returns 8,732 $ bottleneck impact for constraint-attributable impact.
  • At this operating point the engine returns 1,200 $ for recovery setup or expedite cost.

How this compares with the baseline

  • Against the tool's baseline example, where bottleneck-attributable share sits at 90% and the headline result is 9,138 $ bottleneck impact, this scenario comes in 8.69% above the baseline at 9,932 $ bottleneck impact.
  • It multiplies overloaded bottleneck hours by the dollar impact per constrained hour and the bottleneck-attributable share, then adds recovery setup or expedite cost. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Bottleneck schedule impact: 9,932 $ bottleneck impact (headline result)
  • Impact per constrained hour: 236 $ / constraint hr
  • Constraint-attributable impact: 8,732 $ bottleneck impact
  • Recovery setup or expedite cost: 1,200 $

Run it with your numbers

  • Every input above is editable in the live Bottleneck Schedule Impact calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.