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, vol. 5, no. 2, Dec. 2024, pp. 32-40, doi:10.14421/jiehis.4968.