Abstract
With the involvement of network, 15 (Information System) becomes larger and more compleL No longer in the form of a central database with many application programs locating around it logically or physically, IS is aggregated by heterogeneous no des. The two layers(system and node) are quite different in nature. And the nodes are active agents with their own resource and mechanism. Therefore, the system designer should reconsider IS using a hierarchical approach. The CAS (Complex Adaptive System) theory is a nascent discipline provided by Santa Fe Institute at New Mexico, which emphasizes the role of Adaptation du ring the evolution of complex system. We have found that the CAS theory can provide a new perspective for 15 development. Based upon the CAS theory and the understanding of complex 15, we put forward a two-tiered architecture model for IS in WWW environment and argue some issues about the development methodology of IS. Our model is not complete yet and there are still many details to be discussed during the implementation. Here we only suggest a perspective to study the IS. We hope these new ideas will contribute to the IS development.