BLUF is the acronym for Bottom Line Up Front, a method of placing conclusions at the beginning rather than the end. The alternative is BLAB (Bottom Line at Bottom); most managers hate this.
BLUF in conversation
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 state the main point (such as in an interview). The BLUF approach helps top-level managers and senior military officials in decision-making especially under severe time constraints, when faced with numerous issues on a given timeframe, and when communication of essential information is necessary in dealing with high-pressure situations.
BLUF is also useful when conversing at the organizational level. When you're talking with anyone in the organization, there are specific strategies, models, and guides you can use to make your communication effective. First, know your audience. For communication to be effective, we must know the purpose of the communication and share that purpose with the audience. Then report your progress. Your boss, your workers, and your counterparts in other divisions do not want or need to hear a detailed chronology of all the events that led up to this point. In fact, your boss and colleagues want you to be straight to the point. Then follow with premises that led you to that BLUF or conclusion. support the bottom line. Be clear and upfront with what you want your audience to do.