Doi, Hirofumi, and Takeshi Shinoda. “Study on Improvement of Indonesia Shipbuilding Productivity With Theory of Constraints”. International Journal of Marine Engineering Innovation and Research 2, no. 2 (July 10, 2025): 102–111. Accessed January 28, 2026. https://journal.its.ac.id/index.php/ijmeir/article/view/6111.