This document discusses factors that influence whether evaluations improve organizational effectiveness. It defines evaluation and discusses different types of evaluation use, including instrumental, conceptual, and process use. Process use is seen as most likely to enhance effectiveness by facilitating learning and changes in behavior. The document presents a case study of an evaluation of an ex-inmates reintegration project that was subsequently utilized to improve the project design and inform two new projects. Key factors influencing evaluation utilization include quality of the evaluation, organizational support, and external environment. Quality entails stakeholder participation, timely evaluation, and credible evidence.