Optimum cycle length

What is the optimum cycle length? This puzzled me a long time, until I started doing Evolutionary Delivery (Evo) projects myself.

Bottom line: Cut your development time in 1-week cycles. At first, it seems impossible. After some excercise, it turns out to be always possible. If you don't believe it, try once more. Most project managers hearing this story tell me that it sounds nice, but that it is impossible in their project. It is always possible. Ask a coach. Ask me. Within a few hours, you will know how you can start the first 1-week cycle! Thanks Tom, you were right!