Use this to determine how much analysis a decision actually deserves. The Reversible vs. Irreversible framework sorts every decision into one of two categories — two-way doors you can walk back through, and one-way doors you cannot — then matches the decision process to the stakes. Most organisations over-deliberate on reversible choices and under-deliberate on irreversible ones. This tool fixes both errors simultaneously.
Section 1
What This Tool Does
Organisations don't fail because they make bad decisions. They fail because they apply the wrong decision-making process to the decision in front of them. A team spends six weeks building a business case, running financial models, and convening a steering committee — to choose a project management tool they can switch away from in a month. Meanwhile, the same organisation approves a ten-year exclusive distribution agreement after a single executive meeting because the partner "felt right" and the deal had momentum. The first decision got too much process. The second got almost none. Both errors are expensive, but the second one can be fatal.
Jeff Bezos articulated this asymmetry in his 1997 letter to Amazon shareholders and refined it in his 2015 letter, where he gave the framework its most memorable formulation.
Type 1 decisions are one-way doors: once you walk through, you can't easily get back. Type 2 decisions are two-way doors: if you don't like what you find on the other side, you can walk back through. The language is deliberately simple. A child can understand it. That's the point — the framework needs to be fast enough to apply in real time, in any meeting, at any level of the organisation.
The cognitive gap it fills is specific and well-documented. Humans are poor at calibrating deliberation to stakes. Kahneman and Tversky's work on loss aversion explains part of it: we overweight the downside of any choice, which makes even trivially reversible decisions feel consequential. Organisational dynamics explain the rest. Process accumulates. Approval chains lengthen. What started as appropriate rigour for bet-the-company decisions metastasises into the default process for every decision, regardless of magnitude. Bezos called this "using a heavy-weight Type 1 decision-making process on Type 2 decisions" — and identified it as one of the primary causes of large-company slowness.
The mechanism is a triage step, not an analytical framework. You're not building a model or scoring criteria. You're asking one question — can we reverse this if we're wrong? — and letting the answer determine how much process the decision gets. Reversible decisions should be made quickly, by individuals or small teams, with minimal approval overhead. Irreversible decisions deserve the full apparatus: data gathering, scenario planning, devil's advocacy, senior review. The tool doesn't tell you what to decide. It tells you how much to invest in deciding.
What makes this deceptively hard is that most decisions aren't cleanly one type or the other. They sit on a spectrum. And the classification itself can be wrong — a decision that looks reversible may have hidden switching costs, reputational consequences, or second-order effects that make reversal far more expensive than it appears. The framework's power comes from forcing the classification question. Its danger comes from answering it too quickly.
