概要 and 要旨: One-Page Summaries of Plans and Reports
Compare a plan overview and a long report's main points summarized on one page. Follow reading an article summary before its full text and reading a presentation summary first, without inventing a mandatory length distinction.
概要: A plan overview and the relation to article text
概要 (がいよう) means overview or outline. 「説明会の前に計画の概要を一枚にまとめた。」 — “Before the briefing, I summarized the plan in a one-page overview.” The plan was summarized before the briefing. Read the plan as the subject and the briefing as the time reference, without adding approval of the plan or a briefing already held.
「記事の概要を読んでから本文を確認する。」 — “I read the article's summary before checking the full text.” The article summary is read before checking the full text. Follow this reading order without treating a summary alone as examination of the entire article or turning the Japanese nonpast wording into a report that all reading is complete.
要旨: A report's main points and a presentation summary
要旨 (ようし) means gist or main points. 「長い報告書の要旨を一枚にまとめた。」 — “I summarized the long report on one page.” The long report was summarized on one page. The report's length and the summary's length are different facts; the sentence does not make the full report a one-page document.
「発表の要旨を先に読んで内容を把握した。」 — “I read the presentation summary first to understand its content.” The Japanese 把握した reports grasping the content after reading the summary first; the English to understand states the purpose of reading it. Preserve those wording scopes without treating the reading as a report that the presentation has already taken place or ended.
Compare source content even when the length matches
The plan's 概要 and the long report's 要旨 are each summarized on one sheet in the Japanese examples. The matching length does not establish mandatory page counts or a fixed length difference between the expressions.
A plan, article, report, and presentation are different source subjects. Follow what is summarized and its relation to the full text or prior reading, without combining the four examples into one briefing or presentation process.
When a plan's 概要 and a long report's 要旨 are each summarized on one page, what should we compare?
Show the answer and why
Compare the source content rather than impose a length difference. One is the plan's overview prepared before a briefing; the other is the long report's main points. Both use one page, while the article and presentation examples concern their own reading relationships.