This document is the fruit of several years of study on the quality of care and the measurement of performance. I have collected papers that have appeared in many scientific journals, which are divided into practical studies especially the experience of Morocco in terms of quality of care, and theoretical studies especially those related to the performance of the quality of care and its measurement with different frameworks as well as the difficulties of choice and implementation. I hope this book answers a number of questions related to the quality of care and the measurement of the performance of health systems.