Rosyid, Ahmad Nur, Rizqa Amelia Zunaidi, and Aufar Fikri Dimyati. 2024. “Analysis Of Improving Service Quality At The Ssctelkom Surabaya Institute Of Technology Using The Lean Six Sigma Method”. Sinkron : Jurnal Dan Penelitian Teknik Informatika 8 (3):1326-45. https://doi.org/10.33395/sinkron.v8i3.13657.