I don't know if the need to have the entire program written out is most important. The best candidates I've hired show aptitude to ask the right questions and,

I don't know if the need to have the entire program written out is most important. The best candidates I've hired show aptitude to ask the right questions and, in return, ask probing questions about what led to our decisions, have we thought of [x], this is how [x] might work, what about [y] competitor or space within our industry, etc... The most memorable interviews I've come out of / been a part of are the ones in which the candidate leaves me thinking or scratching my head about why we're doing what we're doing and whether they'd be a great fit to help us achieve our goals. This is all from a product management perspective so might not be the same across the board.