I have read it that all the Scrum Teams working on the same product can have different Sprint length. for instance, some teams can have a sprint length of 2 weeks and some can have length of 3 weeks. Can anybody help me understand how can then be velocity calculated in the case where sprint length varies for a different team? To my understanding, Team size and length should be the same for calculating average velocity. Please advise if I am following anything incorrectly.
Thanks