Goldratt was a physicist who wrote The Goal as a novel — a plant manager has three months to save his factory — and smuggled a genuinely important operational idea inside it.
The Theory of Constraints holds that any system's output is limited by a single constraint at any one time. Improving a non-constraint does not increase output; it just produces more work-in-progress piling up in front of the bottleneck.
It is intuitive and almost nobody acts on it. Businesses run efficiency drives across every department at once, which by this argument is largely wasted effort and can make throughput worse.
The five focusing steps: identify the constraint, exploit it, subordinate everything else to it, elevate it, then repeat — because once you fix one, the constraint moves somewhere else.
And an hour saved anywhere else is an illusion. This single sentence reorders most operational priorities.
A department maximising its own output can flood the next stage. Measuring departments individually encourages exactly this, which is why the measurement system is often the real constraint.
These links go to their own work. We summarise and point — we do not republish it.
Anyone running an operation with a queue in it — a workshop, a kitchen, a professional practice, a support desk.
The novel format irritates some readers, and the manufacturing setting obscures how well it transfers to service businesses.
