This seems to be what is described as a 'bricolage'
A bricolage is essentially a hodge-podge definition which appears to involve ideal type [a definition that although contains very specific criterion, does not particularly convey 100% any of the subjects it takes into account]
http://en.wikipedia.org/wiki/Ideal_type
A bricolage seems to be a putting together of these Ideal Types in a loose manner so that each subgroup retains its identity, but the sub-groups themselves for a collective identity.
In this case, the rating scale seems to be largely based on three things - a woman's clothing, their looks, and their personality. Other things obviously like scent or taste or experience would play a role in this, but they appear to play a minor role in comparison to the major thee listed above.
Now this being said that it is a bricolage - the three major components - looks, dress, personality - although independent in and of themselves, strongly influence the other two - almost in a two way triangle
Therefore
Looks
// \\
// \\
// \\
// \\
Personality ======= Dress [it's supposed to looks like a triangle but it didn't work out - you get the idea though
Now a woman can be generally rated on these three things, which is why I would approve of a 30 point scale, since each can be divided into a more concise scale by making each category worth 10 points.
For example:
a woman with a shitty personality - say 4
with a hot body.......................... - say 8
and a mediocre dress................. - say 6
Would rank as 18/30. Translating this inot a percentage scale could also provide useful. This particular woman would rate at 60%. Now keep in mind that 33.3% of this is the dress, 22.3% is based on personality, and the remaining 44.4% is from her looks alone. So to figure it out - what do you enjoy more - a hot bitch with a shitty personality or a nice girl with an ugly body - or a girl who can dress herself well after she's done banging you?
The 30 Point system could allow for a +/- factor of say 3 points for things that are not explicitly accounted for on this scale, say for example she's wearing a tank top with her nipples sticking out. You could put and extra point on her looks column. If she's wearing an old beat up tanker - take one off the dress. Other things include points for extra assets such as nice juggs, intoxicating scent, or whatever else you fancy [pretty feet for you fetishers out there

]
And so this gives a bit of customization to the scale - to account for personal interests. Some people like big girls [not my thing but w/e not my choice and therefore not my problem. However I make sure this does not exceed 3 points nor do I let more than one point into a given section.
Let me know what you think!
Charlie