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Root Cause Analysis

Root Cause Analysis (RCA) is a structured, systematic method for identifying the fundamental causes of defects, failures, or undesirable outcomes rather than treating surface-level symptoms. Popularised by Japanese quality engineer Kaoru Ishikawa in the 1960s–1980s, and formally codified in his 1986 Guide to Quality Control, RCA combines the Ishikawa (fishbone) diagram with the iterative 5 Whys questioning technique to trace causal chains back to their origin.

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Root Cause Analysis (Ishikawa / 5 Whys)

Rekod kaedah taksonomik · process-pipeline / quality-management

Ishikawa, K. (1986). Guide to Quality Control (2nd ed.). Asian Productivity Organization. · ISBN 978-92-833-1036-7

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Same method familyFault Tree Analysismachine-suggested · Relational suggestion, not evidence.Same method familySix Sigma DMAICmachine-suggested · Relational suggestion, not evidence.Same method familyValue Stream Mappingmachine-suggested · Relational suggestion, not evidence.