Maintaining the Organism
It’s my experience that the simplest answer to these types of questions can be summed up in one word: consistency. How do you eliminate as many nasty surprises as possible? How do you make the support each team gives the others well understood and routine instead of asking people to step outside of their comfort zone to ask for help from strangers? How do you make sure that external groups are getting paid on a schedule, with no surprises? How do you make sure dependencies are being met in the correct order so that no one is left with nothing to do, waiting for someone else to finish their work?