| Class | Description | 
|---|---|
| Epsilon | 
 This class implements the unary epsilon additive indicator as proposed in
 E. 
 | 
| GeneralizedSpread | 
 This class implements the generalized spread metric for two or more dimensions. 
 | 
| GenerationalDistance | 
 This class implements the generational distance indicator. 
 | 
| Hypervolume | 
 This class implements the hypervolume indicator. 
 | 
| InvertedGenerationalDistance | 
 This class implements the inverted generational distance metric. 
 | 
| QualityIndicator | 
 QualityIndicator class 
 | 
| Spread | 
 This class implements the spread quality indicator. 
 |