MBA FOR managing operration and information Essay

MBA FOR managing operration and information - Essay theoretical accountA 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 system of logic in the middleware without making changes to the client. Three-tiered architectures overly provide better scalability and significant performance advantages for more complex performances, as MIT IS (2000) recommends.EPS includes one high-productive backend relational database boniface and a middleware server in each office, so tote up of middleware servers equals to 6 (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 train of security and reliability and at the same time it allows to use widely spread Internet connections. Middleware ser ver is an application server, which runs software providing business logic of EPS. Also the server maintains website of permit NHSs office, so pack can receive public information about prescriptions and their treatment history via Internet. Middleware server software also receives queries from client desktops from the NHSs 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 range 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 ac tivities. Therefore using exchangeable client software such