1. Gauge used to assess the carrying out or execution of a process or function of any organization. 2. Quantitative or qualitative measure of the care and services delivered to enrollees (process) or the end result of that care and services (outcomes). Performance measures can be used to assess other aspects of an individual’s or organization’s performance such as access and availability of care, utilization of care, health plan stability, beneficiary characteristics, and other structural and operational aspects of health care services. Performance measures may include measures calculated by the state from encounter data or another data source, or measures submitted by the managed care organization or prepaid health plan. 3. Information that reveals how well a health plan provides a certain treatment, test, or other health care service to its members. For example, Medicare uses performance measures from National Committee for Quality Assurance’s (NCQA’s) Health Employer Data and Information Set (HEDIS) to get information on how well health plans perform in quality, how easy it is to get care, and members’ satisfaction with the health plan and its doctors.