Pumyaem, K., Laotaweesub, W. and Cheevapruk, S. 2021. Management of Plastic Injection Processes: A Case Study of Electric Lamp Manufacturing. Journal of Applied Research on Science and Technology (JARST). 20, 1 (Apr. 2021), 145–156. DOI:https://doi.org/10.14456/rj-rmutt.2021.14.