Begin with the most critical issue. Often, there is a single failure that is the root cause of other problems. By isolating and addressing this failure, rest may be resolved automatically. By following the inputs through the system path and analyzing corresponding outputs is useful to identify the sources of failure. A strong understanding of the system's architecture is necessary for this process.

Root Cause Identification should be the first activity. If it's a Control System cascade failure, them Alarms should be checked for time stamped First out incidence i.e. the one event which triggered the series of failures, and address the Process upset conditions accordingly. If it's a cybersecurity incident, isolating affected zone/conduit first and then checking SIEM Logs to identify initiating anomaly.

The control systems are of two major variety; Discrete and Process oriented ones. I would address the situation considering it is a process related control systems. Every control system those exists are installed with a specific purpose and may not be conflicting on priority usually. Control systems of highest priority comes with redundancy systems in place. Since every control system is in place with a specific purpose and not conflicting; it is imperative to set the priority and criticality for continuity of plant operations. Most important things is do not wait for failure to happen, install recovery plan in place ahead of Golive of project.

Aplica metodos como los 5 Porques, para afinar la punteria sobre la causa raiz. Si son problemas aislados, claramente debemos enfocarnos en el de mayor impacto/riesgo al control, prioriza. Siempre es preferible "hecho e imperfecto". Gestiona a los stakeholders adecuadamente, manten comunicación directa. Nunca brindes una "espectativa " o tiempo de solución optimista.