The Capacity Expansion Engine: the PDCA cycle, refined.
Chapter 4 · “The Capacity Expansion Engine” · by Vinay Pasricha
How should a PDCA cycle actually make a system stronger?
Chapter 4 introduces the Capacity Expansion Engine, the repeating cycle at the centre of the book. It is built on the standard Plan-Do-Check-Act cycle, which the book calls a proven framework for continuous improvement, and it adds one discipline: in every cycle, the current governing constraint is identified and strengthened.
Each stage has a defined job. Plan sets out every step from Action 1 to Action N, the desired output, success criteria, timeline and responsibilities, written clearly enough that someone unfamiliar with the work could follow it. Do runs the plan; it is not where improvement happens but where the system’s limits become visible as friction, delays and failures. Check compares what happened with what was intended and names the element that most prevented full and timely output. Act redesigns the next cycle so that constraint is addressed: training for a skill gap, a redesigned step for a slow process, better information systems for an information gap, reallocated resources for a shortage.
The chapter also explains why many PDCA programmes stall. Teams plan, do, check and act, but the Act stage is not focused on the specific constraint, so the system does not demonstrably strengthen. Four principles govern the engine: the discipline of one constraint, clarity of the sequence, honesty in identifying the constraint, and specificity in the Act stage. Run deliberately, the book argues, the gains compound, from modest improvement in year one to a level of capacity and reliability by year five that the operator of year one would not recognise.
The engine can also be worked through interactively in the Execution Doctrine runtime, the talk-to-the-book companion on this site.
The engine must be operated deliberately.
— Chapter 4, “The Capacity Expansion Engine”
Chapter 4 in full.
The complete text of “The Capacity Expansion Engine”, 906 words, as published in the manuscript on this site.
When the constraint is a leadership seat.
Vinay Pasricha leads searches for leadership and top-management roles in India: CXOs, the founder’s bench and functional heads. Tell him about the organisation and the role. The enquiry is recorded and sent to him directly.
