A collection of essays originally published in the Journal on the Theory of Constraints between 1987 and 1990, compiled by north-river-press in 1998. eliyahu-goldratt founded and published the Journal on the Theory of Constraints as a dedicated venue for developing TOC ideas — at a time when mainstream management journals showed little interest. The essays cover foundational topics: hierarchical management conflicts, the paradigm shift beyond just-in-time, the evaporating-cloud as a thinking tool, and the fundamental measures of throughput-accounting. Chapter topics range from Goldratt's philosophy of science to practical applications of theory-of-constraints in various industries.
The collection reveals how TOC thinking evolved between the-goal (1984) and its-not-luck (1994) — a critical developmental period when Goldratt was moving from manufacturing scheduling insights toward a general management philosophy. The essays are more technical and argumentative than the novels, showing Goldratt engaging directly with objections and alternative frameworks. They document the transition from the the-goal-era into the thinking-processes-development period. For practitioners who already know the novels, these essays provide the conceptual scaffolding that the narratives deliberately leave implicit. See also late-night-discussions, a similar collection of conversational essays on TOC applied to business problems from 1998.