It's a human-factors problem. Something is making the team unable to make a decision and hold to it. My guess is that people fear to commit to a path -- endles

It's a human-factors problem. Something is making the team unable to make a decision and hold to it. My guess is that people fear to commit to a path -- endless noodling in search of a perfect solution is an efficient way to avoid the risk of actually doing something. "The perfect is the enemy of the good". If you build in in your head you are never confronted with the ways that it sucks. If you're leading the group, the solution my be in your exerting firmer leadership, by setting a go/no go point for design decisions and shifting from planning to executing. Some kind of hell may break loose when you do it but this may tell you what the problem has been, e.g., group members who don't accept that there is a leader (you) etc. This is better than being in planning-loop hell. I like tjpick's idea. I would amend shutter's comment to say "get your stuff out the door or fialure is certain".