Eliyahu Moshe Goldratt was an Israeli physicist and management theorist whose Theory of Constraints (TOC) became one of the most influential frameworks in operations management and — through Ching and others — in software development. He is the upstream source of every key concept in Ching's work.
Theory of Constraints
Goldratt developed TOC in the late 1970s and early 1980s, initially through his scheduling software company Creative Output, which produced the Optimized Production Technology (OPT) scheduling system. The intellectual core — that every system has one binding constraint, and that the path to improvement runs through identifying and managing that constraint — was formalized as the Five Focusing Steps: identify the constraint, exploit it, subordinate everything else to it, elevate it, and repeat. These steps are the backbone of Ching's toc-for-software-development adaptation.
The business novel as pedagogy
Goldratt's most consequential innovation was not theoretical but pedagogical: he taught TOC through business novels rather than textbooks. "The Goal" (1984), written with Jeff Cox, follows a plant manager named Alex Rogo through a manufacturing crisis, with a Socratic mentor figure (Jonah) guiding him to discover TOC principles through questioning rather than lecture. The novel format was deliberate — Goldratt believed that people learn by watching a protagonist struggle with and solve real problems, not by reading abstract frameworks.
This decision to teach through fiction became the defining inheritance Ching took from Goldratt. rolling-rocks-downhill is a direct methodological descendant of "The Goal": a struggling software project, a Socratic consultant, and discovery-based learning embedded in narrative. The approach is theorized explicitly in business-novel-as-pedagogy.
Goldratt continued the novel tradition with "It's Not Luck" (TOC in marketing and strategy), "Critical Chain" (TOC applied to project management — highly relevant to Ching's software focus), "Isn't It Obvious?" (TOC in retail), and others. Each novel targeted a different domain and audience.
The 2009 interview with Ching
In late 2009, Ching conducted a 60-minute interview with Goldratt during a masterclass — the event now recorded as goldratt-masterclass-interview. Goldratt explained six lessons he had embedded in "Isn't It Obvious?" that he felt readers were missing. This conversation was later published as six-lessons-with-eli-goldratt (2017), becoming one of the few published records of direct dialogue between Goldratt and the next generation of TOC practitioners. Goldratt died in June 2011, making the 2009 interview one of his later extended conversations on TOC principles.
Ching as intellectual descendant
Ching explicitly positions himself within the Goldratt tradition. The series name "Theory of Constraints Simplified" signals direct lineage. The narrative teaching method, the Socratic mentor figure, the focus on identifying constraints rather than optimizing everything — all of these trace directly to Goldratt. Ching's specific contribution is adapting this inherited framework for software development and knowledge work contexts, domains Goldratt addressed only partially (through "Critical Chain").
The broader transmission of TOC to software runs through several parallel paths, analyzed in goldratt-to-software-transmission-chain: Ching's narrative route, gene-kim's DevOps route through "The Phoenix Project," and david-anderson's systematic route through the Kanban Method. All three descend from Goldratt.