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A BLUF is a paragraph detailing the conclusions and recommendations at the beginning of some text, in order to facilitate rapid decision making. This differs from an abstract or executive summary in that it doesn't necessarily summarize the arguments or evidence included. Traditionally, conclusions and recommendations are included at the end of a text, following the arguments and considerations of facts. The concept is not exclusive to writing; it can also refer to conversations and interviews.
The BLUF model can be routinely seen in executive summaries in reports, subject lines in e-mails, and abstracts in scholarly articles. It applies directly to the format of a résumé to prevent it being too long or wordy. In technical writing, BLUF is considered an essential skill. It has also been advocated for scholarly articles.
In conversation, the BLUF model can be used to keep conversation or answers to questions concise and focused on the immediate topic, in order to help a person talk less (such as in an interview).
The BLUF model can also be used in planning and management to ensure the purpose of plans are kept in mind, decision-maker support is more readably attainable, and measurement of impact may more easily and accurately be assessed.
BLUF is also key in medical assessment to determine quickly the most pressing problem facing a patient.