Thanks for the link looks useful. <i>"Also, if you're hoping that what you have at the end of a Ph.D. will be ready for end users..."</i> I have been writing

Thanks for the link looks useful. <i>"Also, if you're hoping that what you have at the end of a Ph.D. will be ready for end users..."</i> I have been writing production code for a living for the last 6 years so that doesn't bother me. If other contribute then yes it's likely it wouldn't be production ready. To be honest I don't expect anything that comes out of a phD to be ready for end users without considerable work with a different focus. I think to even get that far will be a great achievement for me. The commitment on top of a full time job is my biggest concern. I think I would be taking quite a lot of leave to concentrate on research full time.