A simple checklist of questions can be used to determine how training will be accomplished. This is determined by the company goals. The trainee must be able to answer this. It must be important for learning to be effective. You may need to describe the exact performance you expect.
Some large companies employ training departments.
Many more utilize consultants to do this. The small businessman has many resources available. Sometimes suppliers will do this. The physical setting is important. Who does the training may help determine this answer.