International Software Testing Qualifications Board. (2026). 근본 원인(root cause). ISTQB Glossary. Retrieved October 19, 2026, from https://istqb-glossary.page/kr/%E1%84%80%E1%85%B3%E1%86%AB%E1%84%87%E1%85%A9%E1%86%AB-%E1%84%8B%E1%85%AF%E1%86%AB%E1%84%8B%E1%85%B5%E1%86%AB-root-cause/.
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