Providing the right information, instruction, supervision and training to do the work safely and without risk to health is a basic requirement of many health and safety pieces of legislation. It is not safe to assume people know how something works or how to use it.
 
It is not safe to assume people know how something works or how to use it.
 

Deciding what is needed will depend on a number of factors and will change as new work equipment is bought, new workers are taken on or if there are any changes to the way work is organised. This means you will have to regularly review the information that you give your workers and, when necessary, revise it accordingly. It will also depend on the worker’s experience. The information that new workers need on their first day will be different to what they need after they have been doing their job for a long time.