Bottom up I suggest is best left to err...specialists. That's what my mother always told me.'Outside-in' is a term being used increasingly around the innovation/npd space to denote a customer need first approach - figure out what people want to buy, then build back to existing capability and work out the gap, whats needed to close that gap etc, rather than we have x capability who can we flog it to.Im sure some of the MCs on here can add far more depth to this though.