Planning analysts study your railway and report back: workings that carry too few people to pay their way, trains that are full, units that sit idle, stations your trains run through where a call would pay, and busy journeys between your stations that nobody runs direct - and you can act on what they find from the report: take a working off, add a unit to a full one, or add a call, each checked and shown to you first. Each study can be Basic, Standard or Advanced: Basic is a quick look (a day's counts, or a couple of hours on your busiest routes) with the top few; Advanced takes longest and looks at everything - the counting ones count the passengers on every run for a full week. More analysts get any of them done sooner. Hire them on Staff, like anyone else.