Hardware and program difficulties can frustrate learning and alienate students and their supervisors. Induction is a good example. It is a big ask of a trainer to present the same material over and over again perhaps hundreds of times without variation in quality or content and with the required enthusiasm. Isolated small work groups. Examples are shift workers, geographically remote workers or technically remote workers.
Simulation is required due to either the actual trial being dangerous or expensive.
Plant malfunction trials is an example. The training content is complex and qualified trainers are not reliably available. Human behaviour science is still developing and cultures change over time but for the life of a program the basic science can be taken to be constant. Personnel who require training in human behaviour management tend to be personnel whose time is expensive and availability is individualised. For example supervisors or above.