Will longer agile sprints or iterations cover up opportunities to improve and cause you to view these opportunities as unsolvable problems?
The typical agile sprint size is 2 weeks. What percentage of teams use 2 weeks? I don’t have statistics on it, but I’d guess over 90%. I’m working on a product where we are doing 1 week sprints. It’s a startup and things are changing a lot so 1 week works well. I also know some teams that use 3 week sprints and it is working for them. I’m not saying it has to be a certain number of weeks – but please don’t kid yourself with what length will actually work for you.
I’ve seen situations where people are doing 3 week sprints, but then have a 1 week “hardening” sprint. Personally, I’m not a big fan of hardening sprints. I can see many “logical” arguments on why people need them, but in the 3+1 week sprints – I’d say stop kidding yourself. You have a 4 week sprint! Maybe that is the best you can do right now and you are ACTIVELY working to eliminate the hardening sprint – but if you believe you will always need one you are likely stuck.