The problems of evaluating the efficiency of the enterprise information system’s implementation are discussed. An expanded approach to evaluating the efficiency of the implementation based on the aggregation of dependent indicators is proposed. For some indicators of the implementation efficiency are threshold values introduced which should be reached for successful implementation. The problems of the implementation effectiveness indicator’s normalization are considered. A generalized indicator for the efficiency of the implementation of the information systems is proposed. This indicator is based on the Choquet integral. A practical example of the dependent effectiveness indicators is considered. Taking into account the indicator’s dependence one can build a more accurate of evaluation model the effectiveness of implementation.