[Iskariot]

I decided I needed a quality rating system for my ebook collection.

I remember having read about someone else using a 5 star system who designed a very precise and useful classification for the technical quality of his/her ebooks. This person created an extensive description for what the stars in his/her system represented.

The problem is I do not remember where I read it.
Perhaps Someone here can help me out. I might have even read about it here.

I did a search first of course. But I came up with nothing.
I did read "How I Manage eBooks with calibre" by Unboggling, who uses a quality rating system too, but it is not what I am looking for. It is a bit too vague for me.

Thanks in advance.