Page 171 · Module 07, Operate with Precision · this screen continues that page
All 108 frameworksPDCA Cycle
Turn every experiment into a learning that compounds
The prompt
Copy & paste readyLabelsReplace theseSwap the role below
Pro tip, from the book
The Check step is where most PDCA cycles fail. Teams see a positive result and immediately scale without asking whether the result matched the hypothesis. A result can be positive but the hypothesis still wrong meaning you got lucky, not right. Always check against the hypothesis, not just the outcome number.
Who should run this prompt
Module role profileWho should audit and improve your operations? Operations problems hide in plain sight — in the handoffs nobody notices, the processes nobody has documented, and the decisions nobody has questioned. The roles on this page bring the discipline of people who have built systems that run without heroics. Use them to find what is broken before it breaks you, and to build what scales before you need it to.
Choose any role to drop it into the prompt above. Only the highlighted opening clause changes — the rest of the prompt stays exactly as printed.
◆◆◆◆◆ → ◆ seniority, board level down to specialist◈ outside the organisation
How to make any role sharper
- Add years of experience: "...with 15 years in enterprise SaaS" produces different depth than just the title.
- Add what they care most about: "You care most about [X]" shapes every word of the output.
- Add their communication style: "Be direct. Flag risks first. No jargon." changes the tone entirely.
Use this when
The problem it solvesYour team tries things, some work and some don't, but the learning doesn't carry forward. The same mistakes reappear. Successful experiments don't get systematised. You're improving through trial and error instead of through a repeatable process.
How the framework works
From the printed pageThe PDCA (Plan-Do-Check-Act) cycle was developed by W. Edwards Deming in the 1950s and became the foundation of continuous improvement philosophy in Japan and beyond. Plan (define the problem, form a hypothesis, design the experiment), Do (run the experiment on a small scale), Check (analyse the results against the hypothesis), Act (standardise what worked, abandon what didn't, run the next cycle). The cycle is designed to be continuous every Act step feeds the next Plan. When PDCA is embedded in a team's operating rhythm, the team improves structurally, not randomly.
The method, in four moves
Do these in orderRun PDCA on one small improvement per week — short cycles beat large infrequent ones.
Write the hypothesis before starting 'if we do X, we expect Y because Z.'
In the Check step, compare results to the hypothesis, not just whether results were good.
The Act step must result in either a new SOP or a killed idea, no undecided outcomes. "We'll decide later" is the failure mode PDCA is built to kill. An Act step that ends in maybe isn't an Act step, it's an unfinished cycle, and the learning it should have produced never gets locked in
Where the framework comes from
W. Edwards Deming — PDCA / Shewhart Cycle, adapted from Walter Shewhart, 1950s
Pairs well with
As printed with this frameworkModule 07 — Operate with Precision
Build systems that run without you and improve without being told.
12 frameworks, printed on pages 160–183.
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