Performance indicators reveal how knowledge management programs elevate nuclear organizations' overall effectiveness and accountability. This publication provides specific methods and tools for the identification, development, selection, establishment and use of performance indicators (PIs) to measure and report on the implementation and effectiveness of knowledge management programmes to improve the overall performance of a nuclear organization. It captures examples that are applicable to the entire lifecycle of a nuclear organization. While the guidance is intended primarily for senior and middle level utilities management, the concepts and approaches are useful for all other nuclear organizations, as well as technical and scientific support organizations, regulators and educational providers.