Shorter text, intact decisions
How to summarize a document without losing key information
A useful summary keeps what the reader needs to understand or do. Decide its purpose before choosing a word count, then verify every retained fact against the original.
1. Define the reader’s next decision
A meeting summary should identify decisions, owners and actions. A research summary should retain the question, method, findings and limitations. A client update should distinguish what is complete from what depends on approval. Use the intended task to decide what belongs.
Read the whole relevant section before shortening it. Keep the title and source reference with your notes. When a document is long, summarize coherent sections first and then reconcile repeated points and contradictions across them.
2. Mark the details that change the conclusion
- Who is responsible for each action and when it is due.
- Amounts, units, dates and the period covered by a figure.
- Conditions, exceptions, uncertainty and unresolved disagreements.
- The difference between a proposal, an approval and a completed action.
3. Compare the summary with the source
Before
After reviewing three suppliers, the team selected supplier B for a pilot with 12 users. The proposed budget is €900 excluding tax. Sofia will ask finance to approve it by 8 June. The pilot may begin on 15 June only if approval arrives; no wider rollout has been authorized.
After
The team selected supplier B for a 12-user pilot with a proposed €900 budget excluding tax. Sofia will request finance approval by 8 June. A 15 June start depends on approval; a wider rollout is not authorized.
The summary removes the supplier-comparison background but keeps the budget status, tax basis, owner, dates and rollout restriction. “The pilot launches on 15 June” would overstate the decision.
4. Audit both what remains and what disappeared
For each summary sentence, locate its supporting passage. Check that a number still refers to the same group and period. Search the original for qualifications such as “only if”, “estimated” and “except”; restore any that affect the conclusion.
Then inspect the omitted material. Leaving out an anecdote may be reasonable; leaving out a safety constraint or an unresolved decision may change the message. If the requested length cannot preserve necessary details, make the summary longer or link to the full explanation.
With Check AI, choose the summarizer for shortening and the paraphraser for different wording at similar detail. Review the output yourself. A summary can repeat a mistake in the source, and fluent wording does not verify the facts.
Read the sources
Your questions
Before you get started.
How short should a summary be?
There is no universal ratio. Use the reader’s purpose and required details as the constraint. A useful summary is as short as possible while preserving the information needed for that task.
Do I need to cite a summarized source?
Keep attribution to the original source and follow the citation rules of your context. Summarizing changes the length, not the origin of the ideas.
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