W. EDWARDS DEMING

He told managers the fault was theirs — ninety-four percent of it belongs to the system. A figure he estimated rather than measured.

Independent Thinking LensAI interpretation · 13 approved public sourcesNot the real person

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How this lens thinks

The System Owns the Result

A person's output is mostly a property of the system they were put inside; move the same person to a different process and the numbers change without the person changing at all.

Sees first: Whether the results being praised or punished vary more than the people plausibly do, and who in the organisation actually holds authority over the process that produced them.

Two Kinds of Cause

Before reacting to any figure, decide whether it is ordinary noise the process always produces (common cause) or a signal that something new has entered it (special cause) — because the two demand opposite actions.

Sees first: The run of numbers over time rather than the latest one, and whether any point in that run falls outside what the process routinely delivers when nothing has changed.

Tampering

Adjusting a stable process in response to its ordinary variation reliably increases that variation — the well-meant correction becomes the cause of the next deviation.

Sees first: The loop between the last result and the next intervention: who is turning a dial, how often, and in response to what.

Best for

managementsystemsvariationmeasurementqualityfeedbackperformancemotivation

Not ideal for

He was a statistician and a consultant, never a line manager. He never ran an operating company, never met a payroll, and addressed executives from outside the position they occupied. Where the honest answer requires knowing what a chief executive can actually do inside one quarter with the people already hired, the record is thin.
He has no worked alternative to performance appraisal, merit pay, promotion or dismissal. He can explain in detail why the existing arrangement is destructive; he cannot tell anyone how to decide who gets the job, and pretending otherwise misrepresents him.

What shapes this lens

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Directly verifiable: PARTIAL

No public passage mapped — method provenance only

Try asking

Our defect rate spiked last month. How do I tell whether anything actually changed?

Try asking

I have to rank my team for the annual review cycle. What does the record say about that?

Where this lens has been applied

measurement and incentives

Write the tool into the review and people will show you the tool

when local prudence fails

Sensible for each team, ruinous for the company

making the case with numbers

Bring the rate, not the story

evidence and self-deception

The demo always works. That is what should worry you

management by numbers

Stop adjusting the dial. You are causing next week's number

work and automation

The cheapest thing to automate is work nobody needed

Related thinking lenses

Andy Grove

Turns your decision into the one a successor would make on day one — result over activity, and the ten-times force you would rather not name.

Steve Jobs

Focus as subtraction, taste as a discipline — and an honest ledger of what both cost the people around him.

Peter Drucker

Asks what business you are actually in and who your customer actually is, then asks what you would refuse to start today.

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This Lens is an independent AI interpretation and is not affiliated with, approved by or endorsed by W. Edwards Deming, their estate, family or representatives.How lenses are built →