Marketing used to be easier, didn’t it? You’d have one team doing broadcast and print, and another in the back room doing direct mail. That was about it. The “barriers” between disciplines could be breached with a few steps down the corridor. No more. Esoteric functions like Conversion Rate Optimisation and Behavioural Analytics are specialized skill sets, often not even located in the same country, let alone the same office. Yet they can all add value to each other – if they’re truly (to paraphrase David Ogilvy) one department indivisible.