What it means
に基づいて means “based on” or “according to.” It indicates that an action, decision, judgment, or conclusion uses a particular source, rule, standard, fact, or set of data as its foundation. It normally follows a noun and is common in formal, academic, professional, and written contexts, although it can also be used in careful speech.
Usage note
に基づいて usually follows a noun naming the basis for an action or judgment, such as evidence, regulations, research, or data. It should not be treated as a direct equivalent of で, since で has several different functions and does not specifically express this “based on” relationship.
How to use it
研究結果に基づいて、計画が修正されました。
Based on the research results, the plan was revised.
研究結果に基づいて、計画が修正された。
Based on the research results, the plan was revised.