Savitri, B. A., & Handayani, A. (2023). Analysis of Quality Cost Optimization at PT. XYZ in Gresik Regency. Journal Universitas Muhammadiyah Gresik Engineering, Social Science, and Health International Conference (UMGESHIC), 2(1), 52–62. https://doi.org/10.30587/umgeshic.v2i1.5118