What's the ideal Sprint length

Hi Jack,

I'm relatively new to Scrum, not to software development. I think that there are some situations shorter sprint is a better solution (2 weeks, 1 is too short in my opinion).
There are two things we must keep in mind tailoring the process: time-boxing and "the art of possible": time-boxing simply helps to keep focused, meanwhile we must give our customer some useful "thing" (business value). if we just need time-boxing, maybe our approach to customer is not correct.

At the same time I'm wondering a (big) project with two sprint sizes:
four weeks for the first 2/3 sprints, when it's more difficult to develop something really valuable, when the team is still forming and not performing yet, ecc.
2 weeks for the following sprints

But would the product owner prefer to attend sprint review 2 times a month, with the possibility to change requirements more frequently but with a greater effort with less valuable increments, or would he/she prefer longer sprints ? And the team (more changes = less focus) ?

p.s. Now we are in the middle of the sprint number 8, 2 weeks each sprint.

Matteo

We run one we sprints at my company and as you stated it definitely stresses the systems in place. We know very quickly if something is not right and can address it. It has caused the "underestimated" argument to come up a few times, but usually we find it is an over commitment issue. We don't adjust the size of our sprints to accommodate not hitting our commitment, but we do lower the committed velocity to a more realistic and accurate number after about the 2nd or 3rd iteration.

Probably one day longer than the spring length the team has chosen? :-)
Seriously though. I have worked in one and two week sprints and my favorite is the one week model. We found that there is less time for things to go astray, and the team has to demo at the end of each week. So you get more focus on the delivery.
I would have thought though the type of work also plays a part. If your building something where one week does not normally result in something to demo but two weeks would, two weeks has to be better.

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assuming you buy the argument that shorter Sprints are better. My initial quick answer to the question is don't try to lengthen the Sprint. Rather try to figure out why you're only hitting 60% - 70% of your originally committed goals.happy birthday

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