Suneet Singal on reversible and irreversible decisions

Suneet Singal's decisions library includes this page on reversible and irreversible choices, written beside the podcast The Opportunity Notebook with Suneet Singal. The page teaches a management heuristic. It does not quote him, and it does not claim that a particular deal in his real estate or corporate finance background was reversible. Some commitments can be undone at a modest cost. Others change the ground you stand on, so that returning is a new project rather than a simple reversal. The popular wording of Type 1 and Type 2 decisions appears in Jeff Bezos's 2015 letter to Amazon shareholders, which is public as an SEC exhibit. This entry uses that letter for the wording only. It is not a legal analysis and not a note about Amazon as an investment. The practical test is what it would take to undo the choice, who would still be bound, and which facts waiting would destroy. A labeled hypothetical keeps the example fictional.

Doors you can reopen

Some choices can be undone. You try a Saturday schedule for a month, dislike it, and restore the old one. The cost of the trial is real, and the way back is still there. Other choices change the ground. You sell a tool the club cannot replace, publish a fact you cannot unpublish, or promise a date that other people have now built their week around. Coming back is possible only as a new project, with new costs and new permissions. The difference is reversibility. It is a property of the path back, not a mood about how confident you feel. Confidence can be high on a one-way choice and low on a choice you could reverse before lunch. Match the process to the path back, not to the volume of the discussion.

Jeff Bezos's 2015 letter to Amazon shareholders, filed as an exhibit in the company's 2016 proxy materials, gave this distinction a wording that managers now repeat. The letter calls consequential, nearly irreversible decisions Type 1, and compares them to one-way doors. It calls changeable decisions Type 2, and compares them to two-way doors. It says most decisions are of the second kind, and that they can be made quickly by people with good judgment. It also says large organizations tend to drag the heavy Type 1 process onto Type 2 questions, and that the result is slowness, a fear of experiments, and less invention. A note in the letter adds the opposite warning: organizations that treat true one-way doors with a casual process do not last long enough to become large. This page uses that public wording as a heuristic. It does not adopt a company strategy, and it does not suggest buying or selling anything.

Suneet Singal is not the author of that letter. His published professional background is in real estate and corporate finance, fields in which some commitments are slow to undo and many small ones are not. This entry does not sort any episode of his work into Type 1 or Type 2. It offers the test to the reader. Before you borrow the speed of a two-way door, write what walking back would require. Before you borrow the ceremony of a one-way door, write what would actually be destroyed by trying a smaller version first.

What reversibility requires

A choice is reversible when you can return to a state close enough to the old one that the people involved would call it a return. Close enough is the part that needs writing. The calendar can go back to the old schedule, and the month of the trial is still gone. If the month was the point of the experiment, the choice was reversible in the sense that matters. If the month contained a promise to a guest who has now traveled, the choice was not reversible just because the calendar app allows an edit. List the residues: money spent, trust spent, information made public, options closed by the clock. Residues that you accept are part of an honest trial. Residues that you cannot accept are a sign that the door is one-way.

Speed is not the definition. A reversible choice can still deserve an hour of thought if the trial would be rude or expensive. An irreversible choice can sometimes be made in an afternoon if the facts are already in hand and waiting would itself destroy the option. Bezos's letter argues for speed on two-way doors and deliberation on one-way doors. The argument is a warning against using one speed for everything. It is not a claim that fast is brave and slow is wise. Ask which error you are about to make. Using a heavy committee on a change you could undo Friday is one error. Using a quick chat on a promise you cannot undo is the other. Name the error you are refusing today.

Partial reversibility is the ordinary case. You can undo the public part and not the private part, or undo the cash and not the time. Write the partial path in a sentence. We can cancel the room deposit until Thursday, and after Thursday the deposit is gone and the date is still changeable until the invitations go out. That sentence is more useful than a label of Type 2 stuck on the whole project. Labels help the memory. The path back helps the choice. If you use the labels, attach them to a specific commitment, not to an entire season of work that contains both kinds of door.

Where people mislabel the door

Groups mislabel doors in predictable ways. They call a choice irreversible because it is important to them. Importance is not the same as a missing path back. A wedding date matters and is hard to undo. A logo that matters can often be tried on a single poster and then changed. They also call a choice reversible because a contract has an exit clause they have not read, or because they feel they could apologize. An apology is a new act. It does not restore the information, the week, or the other party's plans. Hammond, Keeney, and Raiffa describe a status-quo trap, a preference for leaving things as they are. One face of that trap is treating every change as a one-way door so that the current state wins without a trial. The other face is treating a true one-way door as a draft so that momentum can skip the deliberation.

Another mislabel comes from identity. If I personally could tolerate a reversal, the choice is reversible. The test is wider than the decider's feelings. The volunteers who changed their shifts, the guest who booked a ticket, the neighbor who planned around the noise: their path back is part of the door. A reversible decision for the person who can absorb the cost may be irreversible for the person who cannot. Write the name of the person who would have the hardest time returning. If you still call the door two-way, you should be able to say how that person gets back, not only how you do.

Kahneman, Lovallo, and Sibony ask reviewers to slow down in a different sense: to check the quality of a big recommendation before accepting it. Their checklist is a good companion when the door is one-way. It is a poor excuse when the door is two-way and the checklist becomes a way to postpone a trial that would produce better evidence than more talk. Use the checklist, or the premortem described on the next pages, in proportion to how hard the return would be. A month-long trial of a signup sheet does not need a formal review board. A public commitment you cannot retract deserves the slower tools.

A smaller version, when one exists

The practical gift of a two-way door is a smaller version. Run the workshop once before you print a year's calendar. Lend the room for a night before you promise it for a season. Show the draft to five people before you send it to five hundred. A smaller version is not a way to avoid the decision. It is a way to buy information while the path back still exists. Opportunity cost still applies. The trial uses a Saturday that could have been used otherwise. Name that cost, accept it, and keep the trial small enough that the cost is the price of learning rather than the price of a choice you have already, silently, made permanent.

Some decisions have no honest smaller version. A single promise, once heard by the people who will rely on it, is the decision. Splitting it into a hint is not a trial. It is a way of making the promise without owning it. If a smaller version would change the nature of what you are testing, say so and use the slower process. Bezos's letter treats the shortage of experiments as a cost of dragging one-way habits onto two-way questions. The mirror image is a fake experiment that is actually a launch. Label the document. This is a trial until Thursday, and on Thursday we either stop or we make a new decision. Put the stop date in the same sentence as the start, or the trial will become the plan by exhaustion.

The page on checklists is the place for a short pause before the version you cannot shrink. The page on the premortem is the place to imagine that the one-way version has already failed. Neither tool is required for a signup sheet. Both are available when you have decided, in writing, that the door does not swing back.

A labeled hypothetical about a pilot and a date

This is a labeled hypothetical. The club, the dates, and the money are invented. A neighborhood lecture series can do two different things in March. It can pilot one talk on a weeknight, with a hand-written signup and no public poster, and decide in April whether to continue. Or it can announce a six-date series in the town paper, with a visiting speaker who would book travel. The pilot is close to reversible. The residue is one evening and a small room fee, which in this story is $40, a figure made up for the example. The announced series is much harder to reverse. The speaker's travel, the paper's readers, and the six dates other groups will now avoid are residues you cannot collect back by editing a webpage.

The club's president likes the series and wants the announcement because it feels serious. Serious, in this hypothetical, is a feeling about identity. The door type is a fact about the path back. A member asks the president to write the return path under each option. Under the pilot she writes: we can stop after the night, tell the ten people who came, and keep April free. Under the series she writes: we would have to disappoint a speaker and a public list, and we cannot really do that. The second sentence is the finding. The series is a one-way door and deserves a slower meeting, a premortem, and a definition of what a successful series would be. The pilot is a two-way door and can be scheduled by the two people who would run the night, with the $40 named as the opportunity cost of the room.

Nothing in the story is advice about lectures as a business, and nothing is a claim about Amazon or about Suneet Singal's work. The story's only job is to keep the feeling of seriousness from choosing the door. A serious purpose can live inside a pilot. A casual tone can still announce something you cannot undo. Read the return path, not the tone.

Who gets to use the fast path

A two-way door can be decided by a small group only if the residues fall on people who agreed to that speed. Bezos's letter says Type 2 decisions can be made quickly by high-judgment individuals or small groups. The phrase is easy to quote as permission for one person to surprise everyone else. The permission fits when the people who bear the residue have already granted it, or when the residue is truly small and local. It does not fit when the fast decider is spending someone else's irreversible week. Write the grant of speed in advance. The facilities chair may try room layouts for a month and revert without a board vote. The facilities chair may not promise the room to an outside group for a year. The first grant is a two-way door with a named decider. The second is a one-way door that the grant does not cover.

Judgment, in that letter's phrase, is doing real work. A fast process on a reversible choice still needs a person who will look at the result and actually reverse it. Groups that never reverse are running one-way decisions while calling them pilots. The stop date is a test of honesty. When it arrives, either stop, continue by a fresh decision, or admit that the word pilot was decoration. A culture that punishes every reversal will slowly reclassify every door as one-way, because nobody wants to be the person who walked back. Thank the reversal that a trial was designed to allow. That thanks is what keeps the next experiment possible.

If you do not know whether the door swings back, find out before you choose the speed. Ask what would have to be true on the day after you change your mind. If the answer takes a paragraph of apologies, compensation, and public correction, use the slow tools. If the answer is a sentence and a small named cost, use the fast path and spend your ceremony somewhere harder.

A pause rule for one-way doors

Give one-way doors a pause rule that is short enough to use. The rule in this entry has four lines. What, exactly, cannot be undone? Who bears that residue? What smaller version, if any, would answer the real question while the path back exists? What would we want to know in a year, and can we learn any of it before we step through? The fourth line echoes Kahneman, Lovallo, and Sibony, who ask what information you would want if you had to decide again later, and whether you can get more of it now. On a two-way door, the way to get it is often the trial itself. On a one-way door, the way to get it is a question, a premortem, or a delay that does not itself slam the door.

Write the four lines at the top of the notes. If you cannot fill them, you are not yet ready to borrow either speed. You are still naming the decision, which is the work of the first page in this set. A reversible choice with no decision sentence is only a fidget. An irreversible choice with no decision sentence is how a group discovers, too late, that it has promised something nobody agreed to say. The pause rule is a bridge between the name of the choice and the speed of the meeting.

Then decide, and record which type you thought it was. If you were wrong, and the door was heavier than you labeled, write that down too. The label is a hypothesis about the path back. Reality will grade it. The grading is useful the next time someone says this one is easy to undo, or this one is too important to try. You will have a local history, which is a better teacher than a slogan about doors.

What this entry does not claim

Suneet Singal’s published professional background is in real estate and corporate finance. Company filings linked from this site record a chief executive officer departure from FC Global Realty Incorporated effective 2 January 2018 and an acting chief executive officer appointment at First Capital Investment Corporation effective 12 September 2017. The Suneet Singal Scholarship, Grant and Giving websites describe him as the founder of those programs. This entry explains a general subject. It is not a private track record, a current job title, an investment result, or a quote.

If the door is heavy, use the premortem and a checklist for high-stakes choices. Name the commitment first on what decision you are actually trying to make.