When a task is complicated or genuinely dangerous to learn, a document or a slide deck is not enough. People skim it, forget it, or never open it, and none of that becomes obvious until something goes wrong on the job. A new operator who has only read a manual is not the same as one who has actually walked through the process, checkpoint by checkpoint, and answered questions along the way.
Paper based inductions have the same problem from the other side. A signature on a form tells you someone was handed a document, not that they understood it, and it is easy for a site to end up with a stack of signed forms and no real record of what was taught or checked. When something happens later, there is nothing to point to.
I build interactive simulators that fix both problems at once. They run in a browser on any device, guide someone through the actual process with checkpoints and knowledge checks along the way, and produce a completion record with scores and time stamps, so the training is not just delivered, it is provable.