Who interviews first? Good question. My understanding is that it is based on a scoring system. PIC time, type rating, whether you have been an instructor/evaluator, etc. All of this is factored into one of those fancy math things and out pops the order of interviews.
I do not know any of this for a fact, but somebody, somewhere, sometime told me that his sister's boyfriends brother-in-law heard that this is the way it was done.
Bake