The one-page summary — the planner’s most under-used artefact
The artefact that earns the meeting
Almost every consequential planning decision — a headcount conversation with finance, a schedule change presented to the operations director, a capacity-plan update for the leadership team — lands better if the planner walks in with a one-page summary, and worse if they don’t. The artefact does three things. It lets the audience read at their own pace and arrive prepared. It shapes the conversation around the decision rather than the explanation. And it leaves something behind that travels into rooms the planner isn’t in — the same one page gets forwarded to finance, to the executive committee, to the divisional head, and influences each of those conversations without the planner having to be present.
For an artefact this useful, it’s under-used by a striking margin. Most planning communication still happens via slide deck (too long, too dense) or email body (too informal, doesn’t survive the forward). The one-page summary sits in the middle: short enough to be read, formal enough to be cited, structured enough to be skimmed.
The structure that works
Four sections, in this order, on one page of A4.
1. Recommendation. One paragraph, top of the page. What you’re asking for, what trade-off it implies, what it costs and what it delivers. If the reader stops here, they should have enough to make a decision. Everything else exists to support this paragraph.
2. Background and trade-off. Two short paragraphs. The situation that produced the recommendation, and the alternatives you considered. The trade-off framing matters: the audience needs to understand the choice the business is making, not be told the answer.
3. Evidence. Two or three bullet points or a small chart. The numbers that support the recommendation. Specific, named, sourced. Not the model output — the conclusion drawn from the model output.
4. Risk and ask. One short paragraph. What you’re less sure about, what would change the recommendation, and the specific decision you want from the reader. If there’s nothing to decide, the page wasn’t needed in the first place.
The voice that lands
Three voice rules that recur across the one-page summaries that get acted on.
Active, not passive. “We’re recommending” not “it is recommended.” The planner is the author of the recommendation, not its delivery agent.
Specific, not abstract. “December weeks 49–51” not “peak season.” “£240k of retained customer value” not “significant commercial benefit.”
Numerate but not technical. Numbers are good. Methodology is not. “SL drops by 6 points” is a number. “MAPE of 4.2% with Holt-Winters seasonality” is methodology that belongs in an appendix the audience won’t open.
The four mistakes that destroy the artefact
Too long. The discipline is one page. Two pages is a slide deck pretending to be a summary. If it doesn’t fit, the recommendation hasn’t been distilled yet.
Methodology in the body. The recommendation is the conclusion drawn from the analysis, not a walkthrough of the analysis. Methodology lives in an appendix or a follow-up if asked.
No recommendation. A page that presents options without a recommended path leaves the audience to do the work the planner should have done. Always recommend. You can be wrong. You shouldn’t be silent.
No risk. A recommendation with no risk reads as either over-confident or naive. The named risk and the named signal that would change your mind together demonstrate that the planner has thought about uncertainty, not avoided it.
A worked example: the headcount conversation
The diagram above shows a one-page summary for a headcount approval. Three things make it work.
The recommendation appears in the first paragraph and includes the cost and the value. The finance reader who only reads two sentences has enough to weigh the choice.
The background frames the situation as three options rather than one demand. Finance sees that 58 (the cap), 61 (a compromise), and 64 (the model) have all been considered, and the recommendation is the result of trade-off thinking, not stubbornness.
The evidence and the risk live below the recommendation, available for the audience that wants them. The decision can be made without them; the credibility comes from them being there.
When to use the artefact
Not every planning communication needs a one-page summary. The artefact is for decisions: headcount approvals, capacity plan sign-offs, business cases, significant schedule changes, escalations. It’s not for routine reporting (that’s what MI is for), for operational handoffs (a TL conversation works better), or for technical questions (an email or a meeting). The rule of thumb: if the decision will be referenced later or might be reopened, write the page. If it won’t, don’t.
The compound effect
The single biggest reason to use one-page summaries is the compounding effect on planning credibility. The audience that sees the same artefact format consistently learns to read it efficiently. The artefacts pile up over a year into a record of the planning team’s thinking on the consequential decisions. New senior leaders joining the operation pick up the planning team’s judgement faster because they can read the back catalogue. And in the conversation where the planning team’s judgement is questioned, the planner can produce the page that was written six months ago saying exactly what would happen — which it did. That moment is what credibility looks like in practice.
Conclusion
The one-page summary is the planner’s most under-used artefact and the highest-leverage communication discipline available to the function. The structure is simple, the voice is learnable, and the compounding effect over a year is significant. Operations that adopt the discipline find their planning function gets cited rather than briefed against; operations that don’t find their planning recommendations get rewritten by whoever takes them into the meeting. The page is the difference.
Next in the series: Bad news, communicated well — when the forecast misses or the call was wrong.
Pair this with the executive briefing, talking to finance, and the one-page MI pack.