Historically, training in many industries was carried out by observation, which became known as "sitting by Nelly." The trainee would pick up the skills and processes over a set period of time; unfortunately, the trainee would also pick up the mentor's bad habits, shortcuts, etc. Although a list of specific units was to be covered, the mentor determined the trainee's performance criteria. After a set period of time, usually five years, the training was deemed to be completed. This system led to inconsistencies in standards. The Engineering Industry Training Board (EITB) was founded, introducing a levy system and formalised training. Skills were identified and grouped together in modules; the lift industry identified a minimum set of standards, outlining skills known commonly as "J Modules." No provision was made for escalator engineers; those undergoing training tended to follow an electrical route, backed up by in-house product training.
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