Simulation is a great approach to complex problem-solving in areas like Healthcare. But, too often, a factory-style approach is force fit into what is in reality a very different scenario.
We believe in "Patient Track" modeling --- patients are not boxes to be shuffled along conveyors. They have distinct paths through the hospital/clinic based on morbidity, severity... a host of factors. They are intelligent and autonomous. And, oh yeah, they don't *like* to be treated like a box on a conveyor.
Healthcare simulation is more about effectiveness than efficiency. And it needs to focus on the patient.