Ryanair does have a process but as people have pointed out it is on a need to know basis, I can give you some hints as to why some guys have not been called, how lon ago since you finished training, where you trained, how old you are, what was your average Mark in your ATPL's etc.
All applications are screened if they all meet fr needs then the above criteria starts to get applied and those that get through all of these go forward to training department where they are looked at in more detail.
On a another note guys up for interview and sims from Feb onwards start studying as the sim checks are changing as I'm sure you all know that even guys who do the recruitment read comments on pprune and are fed up of people knowing exactly what to expect then still fail.
Hope this helps you guys,
See you soon
Hope it helps bug this is all I can tell you at the moment.