There are certainly issues with internal bids. Or more accurately the system (Crystal) that allocates courses to bidders. Many variables need to be input, such as the network plan, and training capacity, to name but two. Assumptions also need to be made such as rates of sickness, which are not easily predictable as they have grown rapidly recently. EASA rostering!? Retirements 'should' recommence in less than 12 months. Other factors such as part time availability/take up need to be considered. Finally, both type and engagement freezes are currently being waived as there are insufficient internal bidders for certain positions. Some of those positions may surprise you?
It's a pretty complex and fluid picture at the moment, that will definitely mean that in a few years time we will have another pilot surplus.