The article further infers that hiring people who need less than 6 hours of sleep per night, is necessary for a business to prosper
Please note that the use of a comma in this place is not actually correct, and I do not believe that it significantly aids with reading. I suggest that it be removed.
To begin with, the survey methodologies itself might be problematic on various aspects.
The only other possible error that comes to my mind is here.
"The surgery methodologies itself": are you suggesting a use of a verb form of
"methodologies" (which I don't think exists), or are you just referring to the plural form of the word. Regardless, I believe that is is quite //problematic//, suggesting;
the survey's methodologies may be problematic in various aspectsPlease note possessive for
"survey", or
the methodology of the survey may be problematic in various aspects or
the methodologies adapted in the survery may be problematic in various aspectsOtherwise, I believe the piece is gramatically sound. I cannot really judge on the analysis or suggest and aspects relating to the actual content...lol; however, I believe that the stated observations are well presented.
I hope this helps. And good luck!
ps. How old are you? What level education is this for?