Overall Controller Effectiveness (OCE) is a new metric that brings the proven framework of OEE to the world of process control. OCE evaluates PID loop performance using three core factors: Availability, Performance, and Quality. This intuitive metric allows process manufacturers to assess, compare, and improve control effectiveness at the loop, unit, and plant levels. With OCE, teams gain clear insights into controller health and can take focused action to optimize production and ensure consistent, high-quality outcomes.