A robust FITradeoff multicriteria method and its applications

This paper extends the Flexible and Interactive Tradeoff (FITradeoff) method by eliciting unknown marginal value functions in a robust ordinal regression (ROR) framework. This method asks a Decision Maker (DM) to compare different values alongside a criterion, determining if their difference is larger or smaller than a threshold to find, at the end, the best alternative in a set. In each step, a representative value function is computed to identify which values to compare, their threshold, and to provide visual feedback on the marginal value functions. Compared to FITradeoff the proposed method does not require ex-ante knowledge of the marginal value functions, a strong assumption in the original model. A case study on battery-based energy storage systems and one on supplier selection are provided to verify the feasibility and effectiveness of the method.