The Goal

A plant manager is given three months to turn his factory around or see it closed. He runs into an old physics professor in an airport who refuses to tell him anything directly and instead asks questions, and over the next few months he works out that almost everything his plant measures is the wrong thing.

It is a textbook disguised as a novel, and the disguise is thin — there is a marriage in trouble and a scout troop hike, and both are there to carry an idea. The hike is the famous one: a column of boys of different speeds, and no matter how you rearrange them the whole troop moves at the pace of the slowest. That is the theory of constraints. Every system has one bottleneck; time gained anywhere else is not gained at all.

The conclusions were unpopular when it appeared in 1984 and are now ordinary: local efficiency measures can make a plant worse, running every machine at capacity builds inventory rather than output, and the goal of a business is to make money rather than to be busy. It is still assigned in operations courses forty years on, and it reads faster than any textbook has a right to.