MBA FOR managing operration and information Essay

MBA FOR managing operration and information - Essay Example A significant advantage of the three-tiered model is that the business processing is done on a centrally controlled machine. This provides for increased security and in some case makes it possible to change the business processing logic in the middleware without making changes to the client. Three-tiered architectures also provide better scalability and significant performance advantages for more complex applications, as MIT IS (2000) recommends. EPS includes one high-productive backend relational database server and a "middleware" server in each office, so number of "middleware" servers equals to six (the number of NHS offices). Communications between database server and "middleware" servers are provided via Internet using tunnelled TCP-IP channels. This technology provides high level of security and reliability and at the same time it allows to use widely spread Internet connections. "Middleware" server is an application server, which runs software providing business logic of EPS. Also the server maintains website of appropriate NHS’s office, so people can receive public information about prescriptions and their treatment history via Internet. Middleware server software also receives queries from client desktops from the NHS’s office, transfers them to database server and then delivers results of the queries to corresponding client desktop. There are a number of client desktops in each office connected to "middleware" server via client applications through local area network (LAN). In this way high-speed connection to the application server is achieved. Client software with appropriate user interface is launched on every client desktop. Doctors and patients can connect to the EPS through thin clients. A thin client is a computer (client) in client-server architecture networks, which has little or no application logic, so it has to depend primarily on the central server for processing activities. Therefore using standardized client software such