One of my colleagues says that few e-commerce companies follow a single day agile sprint cycle, as at times they have to be competitive in terms of feature releases and launch new sales campaign, etc. He adds that there is an R&D team in such companies, which sets the daily development target and that target gets QA/release on daily basis.
What I understand is doing a daily sprint might be too difficult, as in the same time there needs to be regression/build/sanity testing and a sprint cycle should be long enough so, that developers also have time to re-fix the bugs reported in the sprint. And in general companies follow a sprint cycle of 2-3 weeks and companies which have good amount of automation for QA and Continuous Integration tools practice do follow a single week of sprint cycle.
Please advice if a sprint cycle can be as long as 1-3 days?