The three areas of operational excellence in AWS Well-Architected Review are:
Preparation: This area focuses on establishing the foundation for operational excellence, including developing and documenting procedures, training staff, and implementing monitoring and alerting systems.
Operation: This area focuses on running and managing workloads in the cloud, including responding to incidents, performing preventive maintenance, and optimizing performance.
Evolution: This area focuses on continuously improving operational excellence by learning from experience, adopting new technologies, and responding to changing business needs.