This unit of competency covers the skills and knowledge required to participate in hazard and operability studies (HAZOP).HAZOP is a systematic method for examining complex facilities or processes to identify actual or potentially hazardous procedures and operating issues within the design, construction and commissioning of equipment and plant so that they may be eliminated or mitigated. Typically a multi-disciplinary team comprising operators, engineers, safety and other personnel will review a change in plant, process or equipment to see if the change can cause unforeseen hazards or introduce unexpected operability problems and confirm that the change meets the standards.This unit of competency applies to senior technicians and those in similar roles who are required to apply in-depth knowledge of process and plant in order to review piping and instrumentation diagrams (P&IDs) or similar in relation to a proposed change, identify possible hazards or operability issues, recommend amendments to improve safety and operability of the change, and review and amend procedures in relation to the change.This unit of competency applies to an individual who is part of a multi-disciplinary HAZOP team. At all times they would be liaising and cooperating with members of the team.No licensing, legislative or certification requirements apply to this unit at the time of publication.