Simple question, how long should sprints be?
My knee-jerk response to this question has always been '4 weeks maximum and a consistent length unless the team decides to change it'. But the Scrum guide specifically says less than 'one calendar month'.
My question is, why doesn't it say 4 weeks? If the sprint length was set at one calendar month, the length will change, but with 4 weeks it is fixed.
Thoughts?