A root cause analysis can best be described as a process that is used to

Root Cause Analysis (RCA) is a structured, problem-solving methodology used to identify the fundamental, underlying cause(s) of a problem or an undesirable condition. The primary objective is to move beyond treating the immediate symptoms and to uncover the "basic reason" for the failure. By identifying and addressing the true root cause, an organization can implement corrective actions that prevent the problem from recurring, leading to sustainable process improvement. The process involves systematically investigating an issue to determine not just what happened, but why it happened at its most foundational level.

A. Evaluating corrective action plans is a distinct step that occurs after the root cause has been identified and a plan has been formulated.
C. Identifying symptoms is the initial step in problem-solving that triggers an investigation; RCA is the process used to look beyond these symptoms.
D. Differentiating between major and minor problems is a prioritization or risk assessment activity, which typically precedes the decision to conduct an RCA.

1. Russell, J. P. (Ed.). (2021). The ASQ Certified Quality Auditor Handbook (5th ed.). ASQ Quality Press. In Chapter 16, "Corrective Action," the text defines a root cause as "a factor that caused a nonconformance and should be permanently eliminated through process improvement" (p. 289). This supports the idea of finding the "basic reason."

2. DeFeo, J. A. (2017). Juran's Quality Handbook: The Complete Guide to Performance Excellence (7th ed.). McGraw-Hill Education. Chapter 5, Section 5.8.3, "Corrective Action," explains that the process involves moving from the symptom to the root cause, stating, "The objective of the corrective action process is to prevent recurrence of problems by eliminating their root cause."

3. Tague, N. R. (2005). The Quality Toolbox (2nd ed.). ASQ Quality Press. The section on "Root Cause Analysis" (pp. 445-448) explicitly contrasts addressing symptoms with finding the underlying cause, describing it as a process to identify "the most basic reason for an undesirable condition or problem."