Companion to: Business Operator's Blueprint Chapter 3 (Constraint) - Workbook tab Ch3
Inputs
Outputs (Little's Law)
Throughput (units / hr)--
Average WIP (in system)--
Capacity Utilization--
Queue Buildup (per hour)--
Reading the result. If utilization is above 90%, even small variability creates exponential queue growth (the Kingman approximation). The Goldratt rule (Ch 3) is to keep the non-constraint resources at 70-85% utilization so they can absorb variability without pushing inventory back upstream.