Usability: i.e. the ease of use/user friendly. Quality of the interaction. Incorporates all other six aspects listed below.
Navigation: Links that are clearly visible, make sense, and are not broken. Also an indication of where one is on a large web site such as Home->Products->Downloads. Answers the two questions: Where am I? Where can I go?
Graphics Design: Appropriate format (jpg (bitmap photos) or gif (bitmap sketches, line-drawings, animations) or flash (vector, animation, video), small picture sizes, number of colours, lossless vs. lossy compression. Could also include page layout here.
Content: good trustworthy frequently updated/changed and clear content that keeps the user engaged/entertained.
Compatibility: with a wide range of browsers (Opera, Internet Explorer, Mozilla, Netscape) and browser versions (Internet Explorer versions 4-7). We use Chrome as our main browser (it is the most popular boreser) is , so design 1stly for it. Also compatible with a wide range of users (age, disability, computer skills, male/female etc). Load time: fast load times (less than 10 seconds). Vector graphics very small (flash). Higher graphics compression with fewer colours, smaller pixel sizes, and lossy compression.
Usability /20
Navigation /20
Graphics Design /10
Content /20
Compatibility /10
Forum /10
SubTotal/100
HTML/CSS/JS Code/100
Portfolio Mark/100
Final Mark (Ass=10% Portfolio=90%)
Then, this is a good read:
http://www.high-higher-highest-rankings.com/pdfs/styleguide.pdf