Supplier Selection Based On a Combination of QFD and DEA with Ambiguous Data

The assessment and selection of the supplier is an important issue, which includes not only quantitative criteria, but also qualitative factors with combination of ambiguity and inaccuracy. The proposed method uses the house of quality (HOQ) to assess the implications of internal dependencies among the supplier s assessment criteria. The upper and lower bounds of the weights associated with the supplier s assessment criteria are determined by adopting a fuzzy method (i.e., fuzzy weight average (FWA)), which allows for the integration of obscure and subjective information as linguistic variables. The vague DEA method for choosing the supplier is utilized by applying the weights of the supplier s assessment criteria (derived from FWA), which is obtained using the obtained HOQ data. In this study, the proposed framework is implemented through a case study in a factory.