Index

Mental Models

Reversible vs. Irreversible Decisions

Reversible decisions can be undone cheaply; irreversible decisions lock you in and require careful analysis before committing.

Distinguishing reversible from irreversible decisions lets you move fast on low-cost choices and deliberate only where it matters.

Core question

If this turns out to be wrong, how easily and cheaply can we reverse it?

Example

Choosing a button color is reversible — ship it and iterate. Choosing a database architecture is largely irreversible — invest the time to decide well upfront.

How to apply

  1. 1.Classify the decision as reversible (two-way door) or irreversible (one-way door).
  2. 2.Move quickly on reversible decisions — speed of learning matters most.
  3. 3.Apply rigorous analysis and broad input to irreversible decisions.
  4. 4.Look for ways to make irreversible decisions more reversible through staging or pilots.

Pitfalls

  • ·Treating every decision as irreversible and creating decision paralysis.
  • ·Underestimating reversal costs — some decisions appear reversible but carry hidden switching costs.
  • ·Using reversibility as an excuse to avoid thinking at all.

Questions

Who popularized this framework?

Jeff Bezos popularized it as Type 1 (irreversible, one-way door) and Type 2 (reversible, two-way door) decisions at Amazon.

How do you make an irreversible decision more reversible?

Use staged rollouts, pilot programs, contractual exit clauses, or modular designs that limit the blast radius of a wrong choice.

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