STARTS from day 1 of joining.
Looking at your 5 sims before your three years. One every six months. Must show consistency and receive predominantly 4/5 which is good. However minor bumps and a couple of 3/5 they may take a closer look at you and see how you go on your last check before putting you forward for a command course. If they think a little more developement is needed they can put you in what is called a pilot developement course maybe a couple of sims and ground school to improve flightdeck manangement.
If you are deemed suitable for command. Stage 1 is the psyche testing , then technical quiz and an interview which is Flight operations and LOFT orientated.
If successful you are selected for a command course.
1 week of groundschool.
3 sim sessions basic handling from LHS.
Then PPC check LHS
ZFT circuits and LVO sim session.
Then 1 of three LOFT excersises which are for training but are also assessed. You then go and do four to 6 sectors line training. Then LOFT 2 followed by more line training then LOFT 3 the complexity of each LOFT progresses.
At the end of LOFT 3 you then do a whole load more line flying up to normally 16 sectors. Then you do your LOFT CHECK. Like the PPC it is a pass or fail item!!
After the LOFT check you are then scheduled for a PRE LINE CHECK again pass or fail. Followed by a few days later you FINAL LHS LINE CHECK. process from first sim session 2 to 3 months!!
Then go for beers.