I must say that you are very fortunate to have talented developers, but that is not always the case. Luckily I am in a position now where I am a one-man army (has it's ups and downs, for sure, but at least I'm solely responsible for f-ups). In the past I was with a company where there was one person for each phase of SDLC. I lost count of the number of times where the Design document and/or Programming Specifications were completely useless documents written by someone who only had an ephemeral view of the intricacies of programming, and ended up being worthless, and a waste of time. Time that could have been put to better use.