Michelle, A., Giza, A., Selvia, S., Valencia, U. C., Michelle, T., Natasha, A., Regina, H. C. T. and Nurhayati, N. (2026) “Quality Control Analysis of a Digital Printing Company Based on Production Reject Data Using the C-Chart & Pareto Chart Methods”, Surplus: Jurnal Ekonomi dan Bisnis, 4(2), pp. 516–526. doi: 10.71456/sur.v4i2.1713.