Improving Traceability System in Indonesian Coconut Oil Company. - Ivan Gunawan; Iwan Vanany; Erwin Widodo; Ig. Jaka Mulyana (IEEM, 2018)

Developing Bulk-Liquid Traceability in Indonesian Coconut Oil Company. - Ivan Gunawan; Iwan Vanany; Erwin Widodo; Ig. Jaka Mulyana; Kevin Cornelius (IEEM, 2019)

A Review of Response Surface Methodology Approach in Supply Chain Management. - Januardi; Erwin Widodo (APCoRISE, 2020)

Modeling the Recall Process of Bulk-Liquid Industry: A Linear Programming Approach. - Ivan Gunawan; Iwan Vanany; Erwin Widodo (IEEM, 2020)

K-Means Clustering Approach to Determine Ore Type in Laterite Nickel Deposit. - Wanni Wanni; Erwin Widodo (ICONETSI, 2022)