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A method worth keeping close.

Boris Cherny · illustrated avatarBoris ChernyAnalytical perspectiveBC-P01

PRODUCT ADVISORY COUNCIL

Rewrite the problem when facts change

Update the problem and success criteria when new evidence changes a premise.

Product Advisory Council · Method card
Boris Cherny · illustrated avatarBoris ChernyAnalytical perspectiveBC-P01

The method

Rewrite the problem when facts change

Update the problem and success criteria when new evidence changes a premise.

When to use it

  • An unclear problem, complicated plan, or confusing changes.

Ask yourself

  • We found a wrong assumption. Should we finish the plan?

Put it into action

  • State what is known and missing, choose a simpler plan, and record why the decision changed.

Keep these limits in mind

  • Explain the new evidence rather than labeling arbitrary changes learning. Execution remains subject to resources, authorization, and risk.
Method summary · Not a personal quote

An analytical method adapted from the public skill package, not a reply or endorsement by the person represented.
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