During the past few decades, many organizations have attempted to increase their productivity
through outsourcing parts of their responsibilities. Outsourcing helps firms reduce their low
value added activities and focus on their high value added activities. It also helps organization
save their time and energy which leads to more efficient units. The idea of outsourcing is more
important for project based organizations where the nature of works is different from a
particular project to another one. This paper presents an integrated balanced score card system
with an adaptation of ELECTRE III method to select suitable resources for outsourcing. The
proposed model of the paper is implemented for a case study of subway system in Iran and the
results are discussed.