Difference between Hazop and Hazid

HAZID analysis is a risk identification tool used after project flowcharts, mass and energy balances, and sketches have been completed. In addition, existing infrastructure, as well as climate and geographic data, are also required, as these are sources of external hazards. This method is a design-driven tool that can help organizations deliver HSE outcomes in projects. This technique that combines brainstorming typically involves designers, as well as engineering personnel from the client side, along with those responsible for project management, construction, commissioning, and operation. The main analysis results and hazard levels can help ensure that the project complies with relevant HSE regulations, and they serve as part of the \"Project Risk Register\", which is a requirement imposed by many licensing authorities. HAZOP is a proven structured team approach used to identify hazard sources once a process design is complete, or to plan modifications. This tool allows for a detailed examination of the processes and engineering intentions behind existing or new facilities, thereby identifying potential hazards in facility operation that go beyond the design intent, as well as the functional failures of individual components within the equipment and their impact on the entire facility. HAZOP is guided by an experienced facilitator. For oil and gas projects, a core team is usually established, comprising personnel from process, instrumentation, machinery, project construction, and operations; at certain stages of the work, process engineers, environmental experts, and company Health, Safety, and Environment (HSE) staff may be added as needed. I looked at the explanations for both. Based on the translated Chinese text, Hazid is focused on design analysis, while Hazop seems to be more oriented toward operational aspects

In the initial stage of HAZID design, hazard identification covers a relatively wide range of aspects and is somewhat rough in nature； HAZOP is a process hazard analysis conducted after the initial design is largely completed, with a greater focus on the process itself