The MOST successful IT performance metrics are those that:

The most successful IT performance metrics are those that contain objective measures that can be quantified and verified. Objective measures are more reliable, consistent, and repeatable than subjective measures, which may vary depending on the perspective or opinion of the stakeholders. Objective measures also help to align IT performance goals with business goals and to communicate the value of IT to the rest of the organization. According to one source1, a good metric is linear, reliable, repeatable, easy to use, consistent and independent. References := ISACA, CGEIT Review Manual, 27th Edition, 2020, page 11; Performance Measurement Metrics for IT Governance