“Brent is a worker, not a work center,” I say again. “And I’m betting that Brent is probably a worker supporting way too many work centers. Which is why he’s a constraint.” “Now we’re getting somewhere!” Erik says, smiling. Gesturing broadly at the plant floor below, he says, “Imagine if twenty-five percent of all the work centers down there could only be operated by one person named Brent. What would happen to the flow of work?” I close my eyes to think. “Work wouldn’t complete on time, because Brent can only be at one work center at a time,”
