An algorithm for weak dening hyperplanes of the PPS in Data Envelopment Analysis

Border points of the production possibility set (pps) have particular importance in data envelopment analysis (dea). the present study aims to provide a method to find weak defining hyperplanes of dea models by the anchor points. anchor points are an important subset of the set of extreme eficientpoints of the pps in dea. they are directly related to weak defining hyperplanes in the productionpossibility set. therefore, we used this feature and ofiered a practical algorithm to find weak defining hyperplanes of pps. eventually, we illustrate our algorithm using two numerical examples.