What is a decision brief.
Not a deck. Not a report. A short document that ranks your next move and shows the evidence behind it.
The dropped Slack file.
A founder dropped a 47-page PDF into our shared Slack last spring. "Strategy review from the agency. What do you think?"
I scrolled. Lots of charts. Lots of frameworks. Three appendices.
"What does it tell you to do tomorrow?" I asked.
She scrolled back through. "It says... 'consider repositioning' or 'explore' a few different options."
That's the difference between a report and a brief. One catalogues. One commits.
The brief is a commitment.
A report says "here's what we found." A deck says "here are some options." A brief says "do this next, and here's why the evidence ranks it above the alternatives."
Three things a real decision brief always contains:
The counter-case is the test. If a brief can't tell you what would falsify the recommendation, it's a deck pretending to be a brief.
A real brief commits. A deck hedges. A report catalogues.
How to read a brief like the buyer.
If someone hands you a strategy document, ask four questions in this order:
- What's the one move? If it's not on page 1 in one sentence, it's a deck.
- What's the evidence? Sources, fragments, quotes. Specific. Not "industry trends suggest."
- What would change it? The counter-case. What new info would flip the ranking? If "nothing," it's an opinion not a brief.
- What's the next 30 days? A brief without execution guardrails is theater.
When a deck is the right deliverable.
Board meetings. Investor updates. Sales enablement. Three places where catalogue + visual > commitment. Don't confuse them with the brief that tells you what to ship.
Back to the 47-page PDF.
We rewrote the agency's report as a 9-page brief. Page 1: one ranked move. Pages 2-7: the evidence in 4 layers. Page 8: the counter-case. Page 9: the next 30 days.
She forwarded it to her board the next day. Approved in one meeting. The agency had done the research. They just hadn't written the brief.
[TODO B · Mechanism/why]
[TODO: Explain WHY the thing in A happens. Cite mechanism, data, evidence.]
[Short italic pull-quote that crystalizes the mechanism]
[TODO C · Application/the move]
[TODO: What to do with the insight. Concrete steps.]
- [Step 1] description
- [Step 2] description
- [Step 3] description
[TODO: When NOT to do this / counter-case]
[TODO: One paragraph showing edge case or when the move is wrong.]
[TODO A' · Callback to scene]
[TODO: Return to the opening scene with new meaning. 2-3 sentences. Don't over-resolve.]
What is a decision brief?
A short document (6-15 pages) that ranks the next strategic move for a business and shows the evidence behind the ranking. Commits to a recommendation. Defensible under questioning.
How is a brief different from a deck?
A deck argues with visuals. A brief commits to a recommendation. The deck says 'here are options.' The brief says 'do this. Here's why.'
How is a brief different from a report?
A report catalogues what was found. A brief ranks what to do next. Reports stop at description. Briefs go through to commitment.
How long should a decision brief be?
6-15 pages. Page 1 is the ranked recommendation in one sentence. Everything after page 1 is the evidence chain + counter-case + 30-day execution layer.
Who writes the brief?
Founder-led intelligence work (a Sprint) produces the brief. Agencies often hand back reports or decks instead. Ask for the brief explicitly. If the deliverable can't fit on 15 pages with a ranked move on page 1, it isn't a brief.
Last updated May 31, 2026. Field notes by Alex Lamb, LoopWorker.