Analysis And Design Of IC Model In Medical Insurance System Based On Three-Tire Structure

The Informatization of Medical Insurance plays a very important role in Medical Insurance reform. The application field of Medical Insurance has its specialties, for the variability and district otherness of the policy require the information system to have strong maintainability and scalability. Most of old system applied Client/Server Structure. In this structure, the client is integrated with user interface and business logic. For the logical is most easily to change, and when changed the client application had to changed entirely. This mades the maintenance and extend of the system very difficult. Three-Tire Structure is the further development of the C/S Structure. It applies theory of layering and adopts Component Technology. The structure is divided into three layers logically. They are user layer, business layer and data layer. User layer is responsible to interact with user, business layer perform logic and data layer access data. By layering, we reduce the coupling degree of business logic with other parts of program, and make it easy to maintain and extend. Component Technology is the further development of Objected-Oriented Technology. It makes program components to be modified and replaced under binary condition. Incorporated with Component Technology, Three-Tire Structure has stronger maintainability and extensibility. Similarly, other enterprise application fields have the same problem, so the research on application of Three-Tire Structure has strong realistic significance. The paper analyzes the status in quo and existing problems of the Medical Insurance information system and will prove the advantage of Three-Tire Structure by applying it in IC Module of Medical Insurance information system. The paper put forwards one kind of system modeling procedure by deploying CMM software procedure, applying Object-Oriented Method and using UML modeling language. Then the paper discusses the procedure of modeling the Three-Tire Structure of IC model by applying the procedure. The case result has proved that the modeling procedure is feasible and application of the structure can settle the problem efficiently.