Trying to respond to you is like screaming into the void but damn my mental state and here we go.
My depot signing on time is 13m. That's 13m from me signing on to wheels rolling on my first train. So, 1m to sign on, pick up my schedule card. Another to read the SPAD notices (if there is anything new) and the Traincrew Information Display (live updates with things like emergency speed restrictions, heat restrictions, whatever), once that's scrolled round that's another couple of minutes, then a check of the main notice case. Once that's done it's time to walk to the cab, 8-10m remain. Leave my messroom, walk across the car park, into the station, check my departure platform, walk to my train, 2 or 3 minutes, 5-7m left. Confirm stops with my conductor, walk down the length of my train, 5m left, set up the cab, check my schedule for anything odd about this train, register the radio, sign into the train management system, set up the PIS, ready to go.
Normally I'm ready to go with about 2/3m to spare.
So where is the 16 minutes of me time I'm missing?