Sea Cucumber Suppliers Selection Using Multi – Objective Optimization on The Basis of Ratio Analysis MethodsIndra Cahyadi, Trisita Novianti, Ernaning Widiaswanti, Heri Awalul Ilhamsah, Sugeng Purwoko and Ananda Syalsabila HidayatMATEC Web Conf., 372 (2022) 02004DOI: https://doi.org/10.1051/matecconf/202237202004