root-cause-analysis

Root-cause-analysis is a method for identifying the fundamental causes of problems. Its designed purpose is to produce actionable insights that feed into corrective-action. Law 8d SERVES: the servant points at the master. Without corrective-action as the target, root-cause analysis is academic exercise. Purpose is by design in safety and quality management practice.

RCA IS a specific kind of cause-analysis — it narrows the general task of identifying causes down to finding the fundamental (root) cause rather than proximate ones. A competent speaker would call RCA 'a cause-analysis technique.' Specific→general, Law 9. Nearest kind is cause-analysis (no intermediate category).

which-came-first test: the concept of a root cause (fundamental reason behind failure) existed long before the formalized method of root-cause-analysis was systematized in the 1960s (Ishikawa). The older concept fed into the newer method.

Root-cause-analysis depends on cause-and-effect reasoning as its operational mechanism: without the ability to trace causal chains (cause-and-effect), the method cannot identify root causes. Law 8 removal test: remove causal reasoning and RCA stops operating — it becomes pattern-matching without explanatory power. This is a present-tense dependency, not historical association.

root-cause-analysis is a systematic method for identifying fundamental causes of failures, built and maintained for the sake of risk-management. Law 8d: for-whose-sake — its designed purpose is to feed root-level findings into risk assessment and control decisions.

Root-cause-analysis is a specific form of hazard assessment: it systematically investigates incidents to identify underlying causal factors, making it a concrete method within the broader hazard-assessment practice.

Law 8d: root-cause-analysis is built and maintained for the sake of safety-investigation. RCA is a method whose designed purpose is to further the operation of safety-investigation by identifying underlying causes. Servant (RCA) → master (safety-investigation).

root-cause-analysis is a method built and maintained for the sake of investigating safety-failures. Its designed purpose is to identify underlying causes of failures. Law 8d: servant (RCA) points at master (safety-failure investigation/understanding).

For whose sake? The fishbone diagram (Ishikawa diagram) is designed specifically to serve root-cause analysis — its branching structure maps causes to effects to help teams identify contributing factors. It is built and maintained for that purpose. Direction: fishbone-diagram → root-cause-analysis (servant → master).

forensics is built for the sake of root-cause-analysis. Forensic methods — systematic evidence collection, measurement, and reconstruction — serve the purpose of identifying underlying causes of failures and incidents. Its designed purpose in safety, engineering, and accident investigation contexts is to provide the evidential basis for root-cause-analysis. For whose sake is forensics maintained? For root-cause-analysis. The servant points at the master.