International Software Testing Qualifications Board. (2026). 重要成功要因（critical success factor）. ISTQB Glossary. October 10, 2026 に https://istqb-glossary.page/jp/%E9%87%8D%E8%A6%81%E6%88%90%E5%8A%9F%E8%A6%81%E5%9B%A0-critical-success-factor/ から取得.
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