Employees are adequately trained when they know:
A good training and supervision process will include these 7 steps:
Slowly and clearly demonstrate in logical sequence all points listed above, while carrying out the activities/operating machinery.
Ask the worker to explain back to you all the points covered in your explanation in Step 1 until you’re satisfied they have understood your instructions.
Let them run through the operation slowly, step by step, and explain what they’re doing as they go until you are satisfied that they understand any dangers, the precautions they must observe, and they are comfortable with the operation.
Don’t leave them on their own until you are satisfied that they are sure of what they are doing and fully understand your instructions.
Check periodically that they are not in difficulty, have not found unsafe short-cuts or become careless and over-confident. If you know of any dangerous short-cuts that others have used, expressly point these out. For example, “Don’t ever be tempted to change the blades without first isolating the power supply. I don’t want you just to switch off the machine. I want you to pull out the plug as well before you put your hands anywhere near the blades.”
Give the worker clear printed job instructions and checklists to follow.
Finish off the instruction with a reminder that the employee shares the responsibility for managing their health and safety.