Agenda items need outcomes
A topic labelled “budget” does not reveal whether the meeting needs a two-minute update, a 20-minute discussion or a decision involving several trade-offs. Write the intended outcome for each agenda item, then estimate the activity needed to reach it.
Include opening context, transitions, breaks for longer sessions and a closing review of decisions or actions. Those minutes are part of the meeting, not overhead that can be wished away.
Discussion is variable
If several people must contribute, allow time for that interaction. A 10-minute slot cannot contain six thoughtful five-minute contributions. For complex decisions, circulate material in advance and distinguish reading time from meeting time.
Workshops often need setup, group instructions, activity time, reporting back and synthesis. Model each phase rather than using the duration of the central exercise alone.
Follow-up is part of the process
Minutes, action assignment and distribution may require additional effort after the meeting. If the meeting is only useful when those actions happen, include follow-up in the total process time.