Paseru, Alvito Tirano, Gatot Yudoko, Dudu Anwar Sanusi, Pandu Zea Ardiansyah, and Agung Limowa. 2025. “Performance Optimization of Coal Hauling Operations Through DMAIC Framework: A Case Study at PT Berau Coal”. Journal Integration of Management Studies 3 (2):261-73. https://doi.org/10.58229/jims.v3i2.360.