Negative Predictive Value (NPV)


The fraction (Proportion) of Documents that are identified as Non-Relevant by a search or review effort, that are in fact Non-Relevant. The complement of Precision; that is, Negative Predictive Value is computed the same way as Precision when the definitions of Relevant and Non-Relevant are transposed. 1


  1. Maura R. Grossman and Gordon V. Cormack, EDRM page & The Grossman-Cormack Glossary of Technology-Assisted Review, with Foreword by John M. Facciola, U.S. Magistrate Judge2013 Fed. Cts. L. Rev. 7 (January 2013).