How new Control Room Operator familiarize themselves with DCS operations for plant start up and shut down one year after commissioning completed?

Mentoring and training of SOP's. Well the best and quickest way always would be a simulator but it's expensive so there is only a few control rooms I have seen it in.

he have knowledge because he is working from one year if he has some poblem that he must see tha manual and troublshoot the problem