When I - for many years - worked in the USA "high-tech" industry,
   I learned to read the Real Engineer's documents [ I was not an "engineer" ]
    with a very skeptical attitude. USA Engineers were (then) very good at "doing" things
      (coding software, designing parts, etc. - but, USA Engineers seemed to dislike documenting
        what they had done - AND, why they had done it - at all. So, "Engineering Technical Writers"
           which, I was one of those - Our job was to "interview" and "research" the Whys, Wherefores,
             - all of the details - and, from this "Create" an End User's Manual. 
        "SHREDDING" A DOCUMENT" - entails reading it very carefully - and capturing your inquiries...