Most companies who have a QMS (Quality Management System) certified according to ISO 9004 or ISO 9001:2015 are accustomed to performing against set objectives and KPIs (key performance indicators), and also demonstrating continual improvement, which we examined in the article ISO 9001 – Where does quality management fit into your organization? But, how can the QMS itself, and its effectiveness, be measured, and is there any one method of doing this that will provide an organization’s top management with one true indicator of QMS performance? Why is measurement needed?