This paper discusses how to route straddle carriers in port container terminals. This problem is solved in the context of
optimizing transport operations. The contribution of the work lies in the formulation and subsequent development of a Six Sigma
Approach solution for the problem. Generating and prioritizing the critical Six Sigma transportation plans, however, are real
challenges in practice. This study aims to develop a novel approach based on a combined ANP and DEMATEL technique to help
container terminals determine critical Six Sigma transportation plans. An empirical case study is used to explore the effectiveness
of the proposed approach.