Can HAZOP analysis be used for process node analysis? Then, dividing this node is a bit difficult. . .

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I have been conducting a HAZOP analysis on the company’s production facilities recently. It’s not for safety reasons, or at least not entirely for safety. The role of HAZOP in conducting hazard and operability analyses on existing installations goes without saying; its advantage lies in the fact that it enables a thorough examination with no gaps left unaddressed. It is possible to conduct a systematic “check-up” of the equipment and process flow. As for me, I plan to use HAZOP analysis to get familiar with this set of equipment and process flows (I just started working at this company:D). I will analyze each individual unit on the process flow diagram – such as various steps, devices, and operations – and through such analysis, understand the function of each unit, the key points to pay attention to, and the operational requirements. I also want to understand the impact of failures or errors on safety and quality. I previously conducted a simple HAZOP analysis, but it was rather rough, and it involved a batch-type reaction with just one reactor. This is a continuous production facility now. So during the process, it turned out to be two completely different things. Analyzing the \"nodes\" alone is easy, but dividing them into categories is not. I have been working on this HAZOP analysis for two days now; it focuses on the reaction units, such as intermediate tanks, heat exchangers, separators, etc. But after analyzing several units. I found that my division into “nodes” isn’t very reasonable; often several factors affect several such “nodes” at once to achieve a particular goal, and I think this should be considered a single unit. However, it is impossible to analyze these several “nodes” as a single “node”. Analyzing them separately fails to achieve the purpose of analysis. I feel the analysis has gotten a bit messy at this point. I have paused my analysis work for now and am reading books on HAZOP analysis; I’m also reaching out here to ask if anyone has any good suggestions. 1. This HAZOP analysis is not solely for safety purposes; it is mainly used to analyze the process. Because I’m not in charge of safety; I’m in charge of the manufacturing process (of course, I also take safety into account – without safety, what’s the point of talking about processes?) ! ). Moreover, I believe that quality defects resulting from errors in the manufacturing process are also a type of accident—a quality accident. 2. At the moment, I am the only one who can carry out this HAZOP analysis. HAZOP is a large-scale project that requires a team. But just because I only have one, it doesn’t mean I shouldn’t use such a tool. After all, HAZOP is like braised pork – just because I’m overweight doesn’t mean I should avoid eating it. My opinion is to give it a try first; if I do eat it, I’ll just exercise more afterwards :D. 3. At present, I have prepared this HAZOP work analysis sheet based on this PID diagram and my preliminary understanding of the workshop; then I take this sheet to the workshop to carry out on-the-job training. Through my own observations during work and discussions with workers on the same shift, I supplement and modify this work analysis sheet – it is a step-by-step process. 4. There are two ultimate goals: one is to enable me to thoroughly understand this manufacturing process through such work and take over its management ； Rather, through such work, it is possible to trace production or quality issues back to the fault point or cause as quickly as possible.