Tirtaningrum AP, Ernawati D. Analysis of the Factors Causing Delays of Delivery Using the Six Sigma Method (Case Study: Kompindo Wiratama Inc.). IJIEM [Internet]. 2023 Dec. 27 [cited 2026 May 28];4(3):259-77. Available from: https://training-ojs3-publikasi.mercubuana.ac.id/index.php/ijiem/article/view/20819