The Goal: A Process of Ongoing Improvement

Goldratt wrote the Theory of Constraints as a business novel — a factory manager discovers that optimising every step of production is counterproductive, and that the performance of the whole system is governed by its single bottleneck. The narrative form is deliberate: Goldratt believed the ideas were simple enough that a story would teach them better than a textbook. For product direction the bottleneck insight is portable and immediate — most product teams are optimising non-constraints while the actual constraint (usually a decision, a dependency, or a person) sits unaddressed. Read alongside Reinertsen for the queueing-theory formalism, Deming for the system-level view, and Poppendieck for the software translation. A book most people have heard summarised and few have read; reading it is better.