What this search usually means in real life
A workflow bottleneck is the stage or resource that limits the pace of the whole system. It may be one person, one team, one approval step, or one recurring queue.
The trick is to inspect flow, not just occupancy. A fully booked team can still be waiting on the same small choke point.
One stage accumulates older work than the rest
Upstream teams keep producing work that downstream teams cannot absorb
Managers repeatedly pull the same people into rescue mode
Service or delivery performance dips in waves
People describe the same blocker every week but nothing structural changes