Idea Of Forcing Daily Standup To 15 Minutes Is Nonsense!

Have you seen scrum master / coach calling off standups once 15 minutes are elapsed irrespective of whether there are still some cards to be discussed (in walk the wall style) or few team members yet to sync up (in round robin style)? Lets get it right. Should daily standups be less than 15 minutes? YES. Should it be forcefully timeboxed to 15 mins by Scrum Master or Agile Coach. NO.