Fikri, Ali Zian, Dharma Widada, and Lina Dianati Fathimahhayati. 2023. “Implementation of Objective Matrix and Root Cause Analysis for Productivity Analysis PT. Indomarco Adi Prima SP Deket Lamongan”. IJIEM - Indonesian Journal of Industrial Engineering and Management 4 (3). Jakarta, Indonesia:597-608. https://doi.org/10.22441/ijiem.v4i3.21715.