VAA (Vulnerability Assessment and Analysis) is a decision support methodology that identifies and prioritizes vulnerabilities in critical equipment and systems to deliver safe and reliable operations. It works by conducting facilitated brainstorming sessions and interviews with engineering and operations staff to produce a substantial amount of information. This information is then analyzed, categorized, and prioritized to establish a list of vulnerabilities for subsequent study using methods like FMEA, fault trees, and SIL analysis. The purpose is to validate risks identified in the initial assessment and obtain more detailed information to inform risk reduction actions. VAA can be applied to any process during any phase and provides a comprehensive final report documenting the identified vulnerabilities and prioritized action plan.