Prison Performance Tables provide a quarterly grading of the performance of all prisons within the Corrections network in New Zealand. A number of factors are used in this analysis, and results are weighted to account for the particular composition of prisoners and facilities at each site. In previous years, all prison performance metrics were combined in a single Prison Performance Table, published quarterly. Performance is now separated into two tables, to improve the transparency and clarity of performance results and metrics.Each prison is graded as exceptional, exceeding, effective, or needs improvement. The table displays the grade of each prison for the previous three quarters, so that trends and changes in performance can be noted.

Information on how results are calulated and previous years' tables are available on the Department of Corrections' Prison Performance Tables webpage (25).