Length Discipline

There is no universal right length for an executive summary. There are wrong lengths for a given context. A one-page summary of a 6-page report is too long. A two-paragraph summary of a 100-page report is too short. The target is approximately 5-10% of the document's total length, with an absolute ceiling of one page for most business contexts.

Three formats — one page, two paragraphs, four bullets — are not arbitrary options. Each is appropriate for a specific reading context.

1. One Page: The Standard Format The default for most proposals, formal reports, and business cases in the range of 10-50 pages. One page of dense, argument-forward prose is what most senior readers expect and can consume in under three minutes. Structure: 3-4 paragraphs following one of the two structural patterns. Margins are not a length solution — a one-page summary with wide margins and large font is still a short summary, and it signals that you could not fill the page with substance.
2. Two Paragraphs: The Briefing Format Appropriate for internal briefings, update reports, and any document where the reader is already informed about the context and wants only the decision-relevant information. Paragraph 1: what is happening and why it matters. Paragraph 2: what you are recommending and what you need from the reader. Two paragraphs is not a lazy one page — it is the right format when the reader does not need the context that a full page would provide.
3. Four Bullets: The Dashboard Format Appropriate for recurring reports where readers are tracking the same metrics across multiple cycles, executive dashboards, and any situation where the reader has established context and needs only updates. Four bullets: the key finding, the primary implication, the recommended action, and the deadline or urgency. Bullets are not appropriate for documents requiring a sustained argument — they compress information but they cannot sustain reasoning. Use them only when the reasoning is already established and you are providing updates within that framework.