What Is a Performance Slice?

A performance slice — also known as a cohort or segment — is a subset of model values of interest in performance analysis and troubleshooting. Slices can be formed from any model dimension, including specific periods of time, set of features, etc. Performance slice analysis is useful when the goal is to understand or troubleshoot a cohort of interest, such as with bias detection, where the generalized dataset might mask statistical nuances.