From what I have been told by management and seen. Every stage has a clear defined pass mark. Once you score that or above you pass, be it mmi, dmi, opc. However, if you pass all stages, congratulations but all your scores from each stage are added together and then that's your final score, we don't see that or are told about it. But, the that score to then used to prioritise taking from the talent pool. When I went through training, all of us hadn't even been a in a talent pool, we all finished the dmi and a week later given a start date. We did meet people however, who were doing other roles around the railway and on team night out who had been in the same talent pool for years and still no start date, and newbies were still coming in over them. I would assume the reason is their overall score was low, but thats just gueswork. I think the whole process is unfair and if this is true which I'm confident it is, then they should just make the pass scores higher. But also, all those on my course used all the softwares and practiced like mad.