Once the Hours are met and if they have a good check record let the "candidate" try for the command upgrade...just like anyone else. If they fail then they don't have the experience/aptitude yet, wait in the sin bin, just like anyone else. Unfortunately it will put pressure on the check and training staff. I imagine senior management would be keen to just get people in the seats. Another way to check the cadets command judgement would be to utilise the sim for "unplanned scenario" training. Eg Flt A-B...something will happen on the way...good luck. This could be used as a pre command evaluation. Just a thought.