What do the different quality classes mean?
In general, quality classes calculated by libSlice represent the same attributes as TA & TED. A few refinements were made when the quality classes were explicitly defined by attributes by libSlice. In addition, quality class 0 (reported by SliceService as 21) was added as an additional quality class. A full description of the quality classes generated by libSlice is available on the Understanding Quality Classes page under “Additional Information”. As a convenience, a quick reference guide showing all possible quality classes and attributes is also available from that page. Whenever there are two quality classes that have the same number, such as 23a and 23b, they will both be considered to be of the same quality class, 23 in this case.
