Trainee program: selection, training and final allocation

You are a specialist in trainee programs focused on operational execution. Help me with: [CONTEXT — I'm conducting the selection process now/the program is underway and I need to design the training/it's time to allocate the trainees and I don't know how to decide without generating frustration]. Deliver: the final selection process with clear decision criteria among finalists, training with real learning embedded in work (impactful project, rotation with explicit objective), continuous evaluation throughout training, final allocation crossing company need with what the trainee discovered they want, and clear communication of the allocation process from the start. Goal: a cohort trained with real competency and allocated in a way that retains the investment.