evaluation of two-stage network based on ratio analysis models

In this chapter, the ratio analysis models are proposed in the multiple forms and different oriented. the relationships between models dea and ratio analysis have been discussed. the two-stage network models based on ratio analysis are proposed. the proposed model in this chapter obtains the overall efficiency of each division in a two stage network in the different times and demonstrates the relationships between the efficiency of whole process and the efficiency of each stages in the different times based on the ratio analysis model. by using of the proposed model, the importance of each stage is considered in evaluating the overall efficiency of the network. the models proposed in this chapter use crs technology. these models incorporate the importance of all output-to-input ratios to calculate the overall and stages efficiencies. this research develops the dynamic ratio analysis to evaluate the efficiency and apply them for evaluation performance of educational centers in iran in a period of three years.