A. Soetara, M. Machfud, M. Affandi, and A. Maulana, “Design on Conceptual Model for Continuation of Lean Manufacturing Implementation in Wood Processing Factory using Soft System Methodology”., Int. J. Adv. Sci. Eng. Inf. Technol., vol. 8, no. 4, pp. 1302–1306, Aug. 2018.