The new management notion of Business Process Reengineering (BPR) has greatly im-pacted both the business and academic sectors globally. Compared with the past manage-ment propositions, its uniqueness lies on the belief in the capability of information technol-ogy (IT). It emphasizes on the importance of IT in the process of BPR. In order to use IT effectively, IT must be considered from the start of a BPR project. Therefore IT does not playa passive role. Instead, the relationship between IT and the BPR approach should be described by the goodness of fit. Based on the rationale, this relationship is studied from the perspective of process characteristics. From literature search and analysis, IT's are divided into four categories according to its capabilities of supporting collaboration and decision-making. The approaches of BPR projects are grouped into parallel integration, vertical inte-gration, and the optimization of task order. Also, BPR is characterized by the number of intermediate processing steps, the level of collaboration, and the amount of work load at each processing step. Data are collected through case studies in the Republic of China, and then analyzed to construct five propositions and relevant conclusions and observations.