Dynamic Modeling of the Relationship Between Risks of Activities and Reduction of Activities Time in the Post-Implementation Phase of the Enterprise Resource Planning System Using Fuzzy Cognitive Maps

In recent years Many Iranian organizations have used ERP systems to improve the performance and effectiveness of their organizational activities, while very few of them have gained sustainable advantages of this system. One of those benefits is reducing of cycle time of production and one of the factors that reduces the cycle time of production is to reduce the time of activities. The successful implementation of an ERP system is just the first step in achieving a successful system and its sustainable advantages depend on continuous support, maintenance and upgrade of the system in the exploitation or post implementation phase. The post implementation phase is exactly where real challenges begin and many dangerous risks are likely to occur. In this study, the relationship between the risks of activities and the time of activities in post-implementation phase is dynamically modelled using Fuzzy Cognitive Maps. The main advantage of fuzzy cognitive map is its ability to model complex phenomena based on expert perceptions. This tool modeling related and uncertain events by imitation of human reasoning. For this purpose, 36 risks were identified and collected and categorized into 5 groups of user, technical, managerial, operational and external risks, and their relationships between them and reduction of time of activities were modelled. According to the findings of this study, managerial risks had the greatest impact on other system risks and output.