Supporting the paradigm shift in vendor selection: multicriteria methods for sole‐sourcing

Procurement is an increasingly important activity within most firms, and severe financial and operational consequences can result from the failure to optimize the procurement function. The multiple criteria, including the financial significance, involved in the selection of a sole‐source vendor are addressed here. Two multicriteria approaches to decision support for vendor selection are presented and are demonstrated through an example. One approach, the simple multiattribute rating technique, is relatively widely used in selection problems. The other approach, data envelopment analysis, is rarely used in such problems but serves as a very acceptable alternative for supporting the vendor selection decision. The results from these two approaches are compared to those based upon a pure aggregation and averaging procedure. For the example being considered, both multicriteria approaches provide similar results, which differ considerably from those for pure aggregation. In addition, the short‐term financial implications are examined so as to underscore the commitment needed by management if non‐cost criteria are to be incorporated into vendor selection.