I learned from an ISO workshop (International Organization for Standards, a quality management system) that the ultimate measure of success is customer satisfaction. Customers, in the end are either satisfied or dissatisfied.
Satisfaction is a never ending quest. Initially, its final test is winning customer loyalty. It then progresses to customer obsession. Now it is customer ecstasy.
Have you ever asked why we keep on coming back to Pulag or our favorite trekking destination?