The superiority and inferiority ranking method (or SIR method) is a multi-criteria decision making model which can handle real data and provides six different preference structures for the system user. It also incorporates outranking rationale to deal with the 'poor' true-criteria preference structure which appears in selecting proper equipment. The superiority and inferiority scores are produced through the generalized criteria. The SIR method can also analyze different criteria without compiling them into a small scale as GAs.
Tam CM,Tong TKL,Wong YW, (2004), Selection of Concrete Pump Using the Superiority and Inferiority Ranking Method, Journal of Construction Engineering and Management, Volume 130, Issue 6, pp. 827–834 (November/December)