How are quality classes calculated?
Quality classes are a single number representation of the set of attributes that a slice has. The attributes a slice has are determined by searching the slice for certain interesting features. The features considered include the quality and direction of the reads in the slice, and the value of the consensus. Quality classes should be used as a rough guide to the overall quality of the slice. Quality classes 1-8 are typically considered high quality, 9-23 are considered low quality. Slices with high quality class numbers are strong candidates for review.
