·Business & Strategy
Section 1
The Core Idea
Jeff Bezos divides all decisions into two types. He calls them doors.
Type 1 decisions are one-way doors. You walk through, and the door locks behind you. Choosing a co-founder. Selling the company. Going public. Signing an exclusive ten-year distribution deal. These decisions are irreversible or nearly so — the cost of unwinding them is so high that it functions as permanence. They demand careful deliberation, broad consultation, and the willingness to slow down when every instinct says move.
Type 2 decisions are two-way doors. You walk through, look around, and if you don't like what you see, you walk back. Launching a feature. Testing a pricing tier. Hiring for a new role before the role is fully defined. Opening a small office in a new market. These decisions are reversible at low cost. They should be made quickly, by individuals or small groups with good judgement, without committee review or multi-week approval cycles.
Bezos introduced the framework publicly in his 2015 letter to Amazon shareholders — the "Day 1" letter that became one of the most referenced documents in modern business strategy. The context wasn't abstract philosophy. It was an operational diagnosis of what was killing Amazon's speed as the company crossed 250,000 employees. His argument was precise: as organisations grow, they develop a systematic bias toward treating every decision like a Type 1. They apply the heavy machinery of analysis, consensus-building, and executive approval to choices that could be made in an afternoon and reversed by Tuesday. The result is a large company that moves like a large company — slowly, cautiously, and with the kind of deliberate thoroughness that is exactly right for irreversible bets and exactly wrong for everything else.
"Day 2 is stasis," Bezos wrote. "Followed by irrelevance. Followed by excruciating, painful decline. Followed by death." The Type 1 / Type 2 classification was his prescription for staying in Day 1 — the operating mode where speed and experimentation haven't been suffocated by process.
The insight cuts both directions. The more common error — and the one Bezos diagnosed at Amazon — is Type 2 decisions treated as Type 1. This is the disease of scale. A product manager wants to test a new onboarding flow. Instead of shipping an A/B test to 5% of users on Monday, she writes a six-page proposal, schedules three stakeholder reviews, waits for legal sign-off, and launches six weeks later. The cost of delay exceeded the cost of being wrong by an order of magnitude. The decision was a two-way door wearing a one-way door's costume.
But the inverse error is just as dangerous and far less discussed. Type 1 decisions treated as Type 2. The founder who fires a co-founder over a weekend argument without consulting the board. The CEO who accepts a term sheet with aggressive liquidation preferences because she wants to close the round before a competitor. The startup that open-sources its core IP on a whim, signalling a strategic direction that can't be credibly reversed. These are one-way doors kicked open at two-way-door speed.
The damage from this error compounds for years. A bad term sheet governs every subsequent financing round. A fired co-founder creates legal exposure, cultural shockwaves, and a narrative that follows the company through every future fundraise. The asymmetry is important: Type 2 decisions treated as Type 1 cost you time. Type 1 decisions treated as Type 2 cost you options.
The framework's value isn't in the classification itself — almost anyone can label a decision as reversible or irreversible after five minutes of thought. The value is in the organisational behaviour the classification unlocks. Once you name a decision as Type 2, you've given the team explicit permission to move fast, skip the approval chain, and accept the possibility of a wrong answer. Once you name a decision as Type 1, you've signalled that this one gets the full apparatus: data, debate, devil's advocacy, and the CEO's direct attention.
What makes the framework operationally powerful — rather than merely conceptual — is that it produces different behaviour at scale. A 10-person startup doesn't need a formal classification system; the founder's intuition handles both types. A 10,000-person company does. Without explicit classification, large organisations default to the highest-stakes decision protocol for every choice, because no individual wants to be responsible for a fast decision that goes wrong. The framework gives individuals and teams cover to move fast by making reversibility an institutional judgment, not a personal risk.
The distinction explains a paradox that confuses observers of Amazon. The company is simultaneously one of the fastest-moving large organisations on Earth (launching hundreds of experiments per week, entering new markets with minimal deliberation) and one of the most methodical (spending years and billions on irreversible infrastructure bets like AWS, Kindle, and fulfilment centre networks). It isn't schizophrenic. It's operating two different decision protocols, matched to two different decision types.
Speed where speed is cheap. Caution where mistakes are expensive.
The metaphor of doors is deliberate. Doors are binary — open or closed — which forces a classification that gradient language ("somewhat reversible," "mostly permanent") avoids. Bezos wanted a forcing function, not a spectrum.
The door metaphor makes it psychologically harder to stall: if you've agreed that a decision is a two-way door, the question "why haven't we walked through yet?" becomes uncomfortable. The metaphor carries its own urgency. And it scales across cultures and languages within a global organisation — everyone understands doors.
