The usual justification for a one-page limit is that senior people are busy. That is true and it is the less interesting half.
The constraint does its real work on the writer. A page cannot accommodate an unresolved question, so attempting one surfaces the unresolved question, which is frequently the first time anybody notices it exists.
Length is where indecision hides
A long document can hold two incompatible positions without either being visible. Present both, weigh both at length, and the reader is left to infer a preference that was never stated. The writer has done a great deal of work and committed to nothing, and both parties may leave the exchange believing something was decided.
One page forces a choice. There is no room to develop the alternative you are not recommending, which means you have to say which one it is.
Which is why the discipline is diagnostic. A page that will not close is not a formatting problem. It usually means the thinking has not finished, and the appropriate response is to go back to the analysis rather than to permit a second page.
What fits
More than people expect, once the material that was never doing any work is removed.
The recommendation, stated as a sentence. The two or three reasons, one short paragraph each. The strongest objection and your answer to it. What it costs, in whatever unit matters. What you need from the reader and by when.
That is a complete decision document and it occupies about four hundred words. Nearly every four-page version of the same thing contains those five elements plus history the reader lived through, restatement of what everyone already knows, and a survey of options nobody was considering.
Attach rather than compress
The failure mode of a page limit is a page nobody can act on, produced by squeezing four pages of necessary content into one.
Some material genuinely has to exist. The engineering assessment, the five-year figures, the legal opinion. None of it belongs on the page and all of it should be available: attached, referenced by name, and clearly labelled so a reader who wants it knows where to look.
The distinction is between what a reader needs in order to decide and what they might want in order to verify. The first goes on the page. The second goes behind it, and a document constructed this way serves the reader who trusts you and the reader who does not without asking you to guess which you have.
What is not acceptable is shrinking the font, narrowing the margins, or reducing the reasoning to fragments in order to claim compliance. That produces a page which is technically one page and functionally unreadable, and every reader recognises what has happened.
Where a page is the wrong unit
The discipline suits decisions and recommendations. Applied indiscriminately it does damage.
Anything whose value is the reasoning itself resists it: an analysis where the method is the product, a genuine exploration of a problem nobody has framed yet, a piece of institutional history being recorded for a successor. Compressing those removes the thing they exist to carry.
Technical and legal writing also resists it, for the reason covered elsewhere in this chapter: the qualifications are the content, and removing them produces something that is shorter and no longer true.
The question to ask is whether length is carrying information or carrying the writer’s uncertainty. Only the second should be cut.
Asking for one page
A leader who imposes this without explaining it will receive compressed four-page documents rather than one-page ones, and will conclude that people cannot write.
Say what the page is for. I want your recommendation and your reasoning on one page, with everything else attached. If you cannot get it to a page, come and talk to me, because that usually means the question is not settled.
That last clause converts the constraint from an arbitrary rule into a diagnostic instrument, and it gives people a legitimate route other than faking compliance. It also means the cases where somebody arrives to say the page will not close are the cases where the leader most needs to be involved, which is precisely the information the limit was there to produce.
The cost
One page takes considerably longer to write than four, and any organization adopting this should understand what it is buying.
Four pages is a transcript of thinking. One page requires the thinking to be finished, the essential elements identified, and everything else removed, which is a different and slower activity. A leader who demands one page and also demands it by four o’clock has asked for two things that conflict.
The trade is nearly always worth it, because the writing happens once and the reading happens eleven times, and because the version that took longer to write is the version whose conclusion the writer actually believes.
Edited by Patrick J. Wolf, PhD