Researching In Design Method Of Distributed Multi-Layered MIS

With the aggrandizement scale of software system, system architecture is increasingly becomes one of the most important factors to influence the performance of software. The design quality of the system architecture could to a large extent affect some important standards such as expansibility, maintainability and efficiency of the software system.Software Architecture is the issue about how to put different parts of software together to constitute a integrate system. An architecture is usually made up of some rules, some advices and some usages and it defines how every parts of the software system communicate and mutual operate with each other.Nowadays the system architecture that has been adopted by most software developers and widely used in the development of large Management Information System is a layered-architecture, also called multi-layered system. The main idea of the multi-layered architecture is to divide the layers of the software system according the different function. The different layer implements the different function in order to achieve the weak coupling between different layers and high aggregation inside layer. Therefore the structure of the software system will become more reasonable, more effective and more expansible.This paper will illustrate a project example called the Hospital Management Information System. Firstly, the paper proposes the design problem of the multi-layered system. Secondly, through the introduction of the characteristics of the MIS development and the relative technologies of the layered-system, it discusses the method of the layered-MIS development and how to use the components within this method. Finally, the paper summarizes the advantages and disadvantages of the design method that has been applied to the layered-system according this project.