Calculate the repair bottleneck
Identify the service constraint using WIP, throughput, and queue evidence.
Open repairs by stage: 18 waiting diagnosis, 7 waiting parts, 3 waiting QC. Diagnosis completes 6 per day, intake adds 9 per day, and only one senior tech can do complex diagnostics. Find the constraint, exploit it, subordinate other work, elevate it, then repeat The common shortcut is adding general labor because the whole shop feels busy. If the queue accumulates before a scarce diagnostic step, general labor can create more started work without more finished repairs. Locate WIP pileup Diagnosis has 18 waiting bikes versus 7 parts and 3 QC. The largest queue is not automatically the constraint, but…
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