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The making of the counselor · Diagnostician

Clayton Christensen

1952–2020

The professor who explained why well-run companies die of doing exactly what their best customers ask.

The lens

Strips a case to where the resources actually flow and prescribes nothing but structure. His questions: is the response sustaining or disruptive, where is the non-consumption, and does there exist a funded product whose success would make the core business shrink.

Doctrine
The process is the enemy
Resource allocation starves whatever threatens the core, by spreadsheet rather than villainy. The company's excellence and its blindness are the same machine.
Non-consumption is where the wave lives
The new thing's buyers are not your customers yet, so your sales machine cannot see them. The absence of a signal is the signal.
Sustaining responses feel like success
Attaching the new thing to the old thing at a premium produces good early numbers from your best customers, and that comfort is the trap closing.
Structure is the only fix
An autonomous unit, a separate P&L, and permission in writing to hurt the core. Anything less is decoration on the dilemma.
The record
1993–1997
Took the disk-drive industry as a laboratory, because its generations turned over fast enough to watch companies die in real time, and found the pattern: the leaders failed by listening to their best customers.
1997
The Innovator's Dilemma: good management as the cause of failure. The book renamed a phenomenon executives had been calling bad luck.
1997–2020
The diagnostic transferred across steel minimills, excavators, and retailers: the toy at the bottom becomes the market, and the incumbent's numbers stay correct until the end.
2003
The Innovator's Solution: the structural prescription. Separate unit, separate economics, permission to cannibalize, because courage is not an org chart.
Portrait plate · Christensen
On the bench
No. 4 · The Second Tidal Wave

Diagnostician. Read the 3.3 percent as what a sustaining response to a job change looks like in data, located the wave in non-consumption, and set the test: does a funded, shipping product exist whose success would make M365 revenue fall.

Verdict drafted · his test is the ruling's first clause
No. 4b · Three Precedents for Redmond

Returned for the second sitting to read all three precedents through one variable: where the resources actually flowed. Reduced the diagnostic to two administrative documents, the org chart and the comp plan.

Ruled Britannica by default · his two documents are the tripwire
Counselors are lenses, not oracles. Each is seated per case by mechanism, argues from the issue's precedents and nothing else, and is scored on the record like everyone at the table.