A startup I worked for twenty years ago used that approach: we shipped an update once a quarter, every quarter, no matter what. We'd begin with a week of planni

A startup I worked for twenty years ago used that approach: we shipped an update once a quarter, every quarter, no matter what. We'd begin with a week of planning, build as much of the plan as we could, then cut anything we hadn't finished and release whatever was left. Of course the trick was to build the high-priority items first. I loved it and I think it was one of the more productive development methodologies I've ever seen. It made sense, it was honest, it required no heroics, and it improved our long-term design work by forcing us to break every grand plan down into a series of incremental deliverables.