Im, Youngjae, Seokhyeon Kim, and Jaein Lee. “A Comprehensive Approach to Voice of Customer Extraction: A Case of Product Development for Smart Washing Machine”. International Journal of Industrial Engineering: Theory, Applications and Practice 33, no. 1 (February 22, 2026). Accessed May 21, 2026. https://ijietap.com/index.php/ijie/article/view/11457.