sugarindra, muchammad. “The Overall Labor Effectiveness (OLE) Method for Analyzing Employee Performance in the Musical Instrument Industry: Overall Labor Effectiveness (OLE) Method for Analyzing Employee Performance in the Musical Instrument Industry”. Journal of Industrial Engineering and Halal Industries 5, no. 2 (December 31, 2024): 32–40. Accessed July 14, 2025. https://journal.uin-suka.ac.id/saintek/JIEHIS/article/view/4968.