TANTIPHANWADI, P.; SIRIPANYA, A.; PANYAKUNANONT, P.; THANACHOTANANKUL, P.; WONGPATIWATE, N.; PHWNGMALAY, S.; WAIYANIT, S. Production Improvement Steps: Lean, Six Sigma and Lean Automation. Naresuan University Engineering Journal, Phitsanulok, Thailand, v. 15, n. 2, p. 47–64, 2020. Disponível em: https://ph01.tci-thaijo.org/index.php/nuej/article/view/240607. Acesso em: 16 sep. 2026.