All five shoemakers have to work in sync with each other. Even if just one of them performs sub optimally, the entire production process will slow down. Just imagine a situation where shoemaker B...

All five shoemakers have to work in sync with each other. Even if just one of them performs sub optimally, the entire production process will slow down. Just imagine a situation where shoemaker B develops a tendency to be slow in the morning and fast in the afternoon.