Process automation and control have played a central role in optimizing production within the modern oil and gas industry, particularly in environments characterized by high risks and operational hazards. While automation enhances efficiency, safety, and consistency, the indispensable role of human operators remains prevalent. According to Karthikeyan M. and Vijayachitra S., process control involves the application of methods and technologies to regulate process variables and reduce operational variability. However, automation does not eliminate the need for human oversight. This review examines the three foundational pillars of optimal operations—Monitorability, Observability, and Controllability (MOC) and highlights the critical roles played by operations personnel in achieving safe, effective, and efficient production. It further discusses how deficiencies in MOC contribute to industrial accidents, downtime, and off-specification products, and concludes with recommendations to strengthen MOC integration in oil and gas facilities.