Noisaat, S., Kantai, N., Bunwatsana, A., Songroek, N., Yutiphong, S., Phromsri, K. and Thanchan, N. 2021. Solving Problems in Corrugated Box Manufacturing with 5 Why Analysis Technique and 5 S Activity. Siam University Journal of Business Administration. 22, 38 (Jun. 2021), 1–8.