Design And Implementation Of A Business Management Information System With Three-layer Structure

With advances in information technology today, enterprises areincreasingly relying on suitable business information system to help themimprove business process, integrate business data and improve efficiency. Toutilize information system for management enhancement is a trend ofenterprise development nowadays.Design and implement the business management information systemfrom requirement analysis to system implementation completion and test.Complying with the software system development life cycle, business logicdesign, the high level program design, detailed design have been completedstep by step begin from system requirements analysis.Browser/Server (B/S) is adopted for system development. In B/Sframework most of the functionality of the system is on the server forprocessing, the clients only need to install a Web browser without othersettings, and the future system upgrades and maintenance phase for thetraditional Client/Server (C/S) architecture of the system become a lot easier.Three-layer structure developing method in system is detailed explained. Thethree layers are data access layer, business logic layer and the presentationlayer. The advantage of the three-layer architecture is to reduce the degree ofcoupling among the system function modules with good flexibility andscalability, security and system logic reusability. It benefits a lots applyingthree-layer architecture for future system upgrades and maintenance costcontrol. The use of Visual Studio2008as developing tool and C#asdeveloping language in business management system implement functions ofthree-layer architecture. Focusing on the weakness of poor user experiencewith traditional B/S framework, JavaScript technology is used to improvevisualization and efficiency for the end user to some extent. After thecompletion of the system, the system functionality, performance, and security have been tested. To analyze various aspects of the system performance bytest case to determine if the system has reached the desired objectives.Finally, a summary of the research and outlook for the deficiencies in thestudy are to determine the direction for further research.