DOSSIER · The system

The Dossier Method: a deep dive into making decisions

Good owners aren't people who never make bad calls. They're people who make decisions the same careful way every time, keep a record, and learn from it. Anyone can learn to decide this way. This page shows you how.

7 min readDossier step: All seven

Why you need a system, not just good instincts

Instinct works when you've seen a situation hundreds of times and got quick, clear feedback. Most owner decisions aren't like that. You hire a few times a year, set prices once or twice, and choose a direction even less often. You don't get enough repetitions for instinct to become reliable.

A system fills that gap in three ways. It makes you consistent, so mood and pressure matter less. It makes your thinking visible, so you and others can check it. And it leaves a record, so a year later you can see whether your reasoning was good or you just got lucky.

That record is the dossier: a one-page file for each important decision. Over time your dossiers become the most valuable document in your business, a history of how you think.

■ Triage first

The three case classes

Before you open a file, decide how big the case is. This keeps you from spending a week on a two-minute choice, or two minutes on a choice that could sink the company. You'll see these class labels throughout the site.

Class IRoutine

Two-way door, low cost. Can be undone easily. Ordering supplies, trying a new email subject line, rearranging a schedule.

Time: minutes

DOSSIER

Class IISignificant

Costly but reversible. Mistakes hurt but can be fixed. A price change, a new tool, a part-time hire, a marketing push.

Time: an hour or two

DOSSIER

Class IIICritical

One-way door. Hard or impossible to undo. Firing someone, signing a long lease, taking on debt, dropping a major client, a partnership.

Time: days, plus a second opinion

DOSSIER

■ The seven steps

Working the case, step by step

Define the question

Most bad decisions start as the wrong question. "Should I fire Alex?" is narrower than "How do I get reliable work done in this role?" Chip and Dan Heath, in their book Decisive, warn about "whether or not" questions because they hide the other options. Rewrite your question until it leaves room for at least two real choices.

Ask: What problem am I really solving? What are my options, including doing nothing? When must this be decided? What does success look like in six months?
Goes in the dossier: The question, the options, the deadline, the case class, and a one-line success measure.
Trap: Solving a symptom. Lost clients may be a pricing problem, a service problem or a sales problem.

Take the outside view

Two moves. First, describe the situation in the third person, using your name, so your ego steps back (covered in Third Person). Second, check the base rate: how do decisions like this usually turn out for people in general? Psychologist Daniel Kahneman called this the outside view. Your plan always feels special from the inside. The base rate tells you how often plans like it actually work.

Ask: What would a new owner do? What would I tell a friend? How do cases like this usually go for other businesses?
Goes in the dossier: One third-person sentence and one base-rate note.
Trap: "My situation is different." Sometimes it is. Make yourself say why.

Sort the evidence

Put everything you know into facts, assumptions and guesses (see What-If First). Then find your shakiest assumption, the one that would change the decision if it were wrong, and look for the cheapest way to test it before you commit. One phone call or a small trial often beats a week of thinking.

Ask: What can I prove? What am I assuming? What evidence would change my mind? How can I test my weakest assumption cheaply?
Goes in the dossier: Top facts, top assumptions, and the one assumption you tested or still need to test.
Trap: Counting opinions as facts. "Clients love us" is an assumption until you see repeat orders.

Run the scenarios

For your leading option, write the best case, worst case and most likely case. Then ask "and then what?" once more. Then run a premortem: assume it failed a year from now and write down why. The key test is survivability. If the worst case would end the business, you need a backup plan or a smaller first step, however unlikely the worst case seems.

Ask: What's the best, worst and most likely result? And then what? If this failed, what's the most likely reason? Can I survive the worst case?
Goes in the dossier: Three short scenarios, the second-order effect, and the top premortem reason.
Trap: Writing a "worst case" that's really just a mildly bad case because the real one is scary.

Interrogate your plan

Now question your favorite option like a suspect (see No Yes Man). Write the strongest case against it, ask what would have to be true for it to work, and for Class III cases, get a second person to attack it. If you can't argue the other side well, you don't understand the decision yet.

Ask: What's the best argument against this? What has to be true for it to work? Who would disagree, and what would they say?
Goes in the dossier: The case against, and who reviewed it.
Trap: Arguing against a weak version of the other side so you can win easily.

Execute the decision

Make the call. You won't have every piece of information, and that's normal (see Tough Calls for the 70% rule). Then set tripwires, an idea the Heath brothers also describe: signals you choose now that will force you to rethink later. "If we haven't signed three new clients by March 1, we stop the ad spend." Tripwires protect you from sticking with a bad call because you've already invested in it. Last, tell the people affected clearly. How you explain a decision decides how well it gets carried out. For how to say it, see Clear at Work.

Ask: What's my call? What signal would make me rethink it? Who needs to hear about it, and how?
Goes in the dossier: The decision, one or two tripwires, and who you told.
Trap: Waiting for certainty that never comes, or deciding but never telling anyone the why.

Review on a set date

Every dossier gets a review date. When it comes, compare what happened with what you expected and grade the decision. Poker player and author Annie Duke calls the common mistake "resulting": judging a decision only by its outcome. A good decision can have a bad result, and a bad decision can get lucky. The Decision Quality Grid below separates the two.

Ask: What happened? What did I expect? Did any tripwire go off? Was my reasoning sound with what I knew then? What would I do differently?
Goes in the dossier: The outcome, a grid grade, and one lesson.
Trap: Skipping the review because the result was good. Lucky wins teach the worst habits.

R · Review tool

The Decision Quality Grid

At review time, place the decision in one square. Over many dossiers, this tells you whether you have a thinking problem or just bad luck.

Good outcome

Bad outcome

Sound reasoning

EarnedDo it again. Note what made it work.

Bad luckKeep the process. Check if a tripwire could have caught it sooner.

Weak reasoning

Dumb luckThe most dangerous square. Fix the process before it fails you.

LessonFind the step you skipped. Write it down.

■ The artifact

What a finished dossier looks like

This is the deliverable of the whole method: one page, every step covered, readable in two minutes. This example is a Class II decision for a small bookkeeping firm.

Dossier No. 2026-014 · Class II

How do we handle growing admin work without burning out?

Example

D · Define

Options: hire full-time, hire part-time contractor, buy software, do nothing. Decide by Dec 1. Success: owner under 45 hours a week by March.

O · Outside view

"A new owner would get help now." Many small firms hire too early and struggle with payroll, so a trial is safer.

S · Evidence

Fact: turned down 6 clients in 3 months. Shakiest assumption: that I can delegate well. Not yet tested.

S · Scenarios

Best: capacity doubles. Worst: salary with no new work. Likely: slow 2 months, then gains. Premortem: "I never trained them properly."

I · Interrogate

Against: full-time locks in cost before delegation is proven. Reviewed by a mentor.

E · Execute

Hire a 90-day contractor. Tripwire: if I'm not saving 8 hours a week by week 6, stop and rethink.

R · Review on Feb 15

Outcome: to be filled in · Grid grade: to be filled in · Lesson: to be filled in

Free download · 4-page PDF

The Dossier template

Fill it in on screen or print it. Includes the case classes, all seven steps and the Decision Quality Grid.

Download the PDF

Rules of the method

Every Class III decision gets a full dossier. No exceptions.
No dossier is closed without a review date.
Tripwires are set when you decide, not after things go wrong.
Grade the reasoning, then the outcome, in that order.
Keep every dossier, including the embarrassing ones. They teach the most.

Ready? Open your first file in the Dossier Builder.

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