If you mean carry out maintenance "strictly by the book" then you're into a situation which is pretty much unworkable, if, the company expects to get anywhere near it's dispatch reliability targets. If you would like me to check the revision status of all the manuals I'm required to work with, and to check the validity of any technical data that I normally store in my head, plus carrying out or checking for the latest risk assessments, any new health and safety legislation, any new information from the airfield operator,( I could go on ) prior to each Engineering operation I carry out, you wouldn't get an aircraft away on time ever! So how "strictly by the book" do you want me to be?