Algorithm to Score Global Quality-Quantity of Files (eBooks)

[asgarcymed]

I would like to create an algorithm to score the "global quality/quantity" of eBooks of each subject.

Each subject has a main subfolder, like:

eBooks\Subject1\(...)

eBooks\Subject2\(...)

eBooks\Subject3\(...)

(...)

I would to create an algorithm/equation/formula to score them (subjects). I think it would be important such algorithm/equation/formula to rely on:

*) Total Size of each Subfolder (the higher the better)

*) Total Number of Files inside each Subfolder (the higher the better)

*) Total Number of Sub-Subfolders inside each Subfolder (the higher the better)

*) Maximum Folder Depth (the higher the better)

*) The Size of the Largest File Size (the higher the better)

*) The Size of the Largest File Size (the higher the better)

I tried many combinations but the resultant score were very absurd, except when:

Score = (Total Number of Files inside each Subfolder) * (Total Size of each Subfolder)

Do you know a better one?

Thanks.

Regards.