Data envelopment analysis method can be seen as one of the newest and most widely used performance evaluation methods. This method measures the efficiency using inputs and outputs of the system with help of different models. In this dissertation, the interrelations amongst networks with dynamic effects were studied, and based on these interrelations a structure was introduced to measure dynamic effects in different time periods easily. Then three methods were proposed to measure the efficiency of DMUs with dynamic effected structures: compound method, slack based measure of efficiency and a method based on series and parallel structures. Finally a solution was proposed to measure the efficiency of DMU in each time period. Keywords: Data envelopment analysis, Dynamic effect, Performance evaluation, Efficiency
