Imposing timing on meetings is irrelevant at best and destructive at worst. The real reason these Agile, Googlesque meeting techniques dictate a time is to for

Imposing timing on meetings is irrelevant at best and destructive at worst. The real reason these Agile, Googlesque meeting techniques dictate a time is to force attendees to prioritize. You can't dick around in a 15 minute meeting. However, by artificially imposing a time limit you also curb productive discussion. Fact of the matter is, some decisions take longer than 15 minutes to come to. Instead of focusing on the time a meeting takes, focus on what needs to get done and who needs to do it. Create concrete objectives, then give one person that responsibility: "John will assign work streams to all team members" vs "Do work planning". No ambiguity - success on an objective is binary.