I've often been dissappointed with the quality of flow diagrams used in healthcare improvement. BUT I totally understand: a) I'm a bit of a geek when it comes to software and b) some of the software tools are just way too complicated - or worse, people try to use WORD or PowerPoint! Here is a diagram I made online in a couple of minutes. I'll be exploring more about how this tool works and post more later. I'm not promoting this particular tool - maybe I've missed other such online tools - but this makes lots of sense, especially for collaborative improvement work.