decision making units (DMUs). A major deficiency in the SE-DEA models is their infeasibility in determining super … infeasibility problem. The proxy introduced to the SE-DEA models replaces the original infeasible DMU in the sample and guarantees a …

the necessary and sufficient conditions for the infeasibility of SE, in the current paper, we have developed a DEA model … with generalized orientation to overcome infeasibility issues. The DEA model with generalized orientation extends the … modified output-oriented approaches are developed to deal with the problem of infeasibility in super-efficiency models while …

problem of infeasibility. Recent studies have shown that directional distance function (DDF) based super-efficiency does not … seem to have the infeasibility issue. However, the existing DDF DEA approach cannot be directly modified to incorporate …

The problem of infeasibility arises in conventional radial super-efficiency data envelopment analysis (DEA) models … developed based on a directional distance function. Although this N–L super-efficiency model does not suffer infeasibility …-efficiency model successfully addresses the infeasibility issues occurring either in conventional VRS models or the N–L super …