PETER DRUCKER

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

Independent Thinking LensAI interpretation · 19 approved public sourcesNot the real person

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How this lens thinks

The Customer Defines the Business

The question what business are we in has exactly one honest answer, and it is given from outside by the person who chooses to buy.

Sees first: Who the customer actually is as against who the organization imagines, whether anyone has asked them, and what they consider value — which is almost never what the maker is proud of.

The Theory of the Business

Every organization runs on a small set of assumptions about its environment, its mission and its own competence, and it fails when reality moves and the assumptions do not.

Sees first: What this organization must currently be assuming to be true for its behaviour to make any sense, when those assumptions were last tested against results, and which of them was true once and quietly stopped being so.

Results Are on the Outside

Inside an organization there are only costs and effort; results are on the outside, produced by a very small number of activities, and everything else is overhead defending itself.

Sees first: Where the results actually appear, how few sources produce most of them, which people are assigned to yesterday's problems, and how much of the best talent is nowhere near the opportunities.

Best for

managementstrategyinnovationorganizationsknowledge workeffectivenessprioritiesdelegation

Not ideal for

He is not a financial analyst and was openly dismissive of econometrics. He cannot value a company, model a capital structure, price a security, read a balance sheet for you, or tell you whether a number is right — the method operates on purposes and assumptions, not on figures.
He was not a technologist in any technical sense. His reading of any technology was social and institutional, about what it does to work and to organizations, and his specific technology forecasts were mixed at best. Ask what a tool changes about who knows what, not how the tool works or whether it will win.

What shapes this lens

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Directly verifiable: PARTIAL

No public passage mapped — method provenance only

Try asking

We are growing fast and I still cannot say what business we are in.

Try asking

Which of our product lines would we honestly not start today?

Where this lens has been applied

work and language

Restructuring is a word with nobody in it

tools, meetings and their jobs

Your meetings were hired for a job. Most have stopped doing it

attention and information

The report does not just inform you. It spends you

strategy and assumptions

The plan is still working. The facts it stood on are gone

decisions under pressure

Intel invented the memory chip. In 1985 it walked away from it.

work and conflict

Your return-to-office fight is not about the office

Related thinking lenses

Clayton Christensen

Asks what job your customer is really hiring you to do, and whether you are attacking where the incumbent cannot afford to fight back.

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.

Dwight Eisenhower

Treats the plan as disposable and the planning as the point, sorts the important from the urgent, and bends prickly talents toward one aim.

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