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Dynamic Systems Development Method - itsycouk - Home Page动态系统开发方法itsycouk -首页.ppt

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Dynamic Systems Development Method - itsycouk - Home Page动态系统开发方法itsycouk -首页

44222: Information Systems Development Dynamic Systems Development Method Ian Perry Room: C49 Extension: 7287 E-mail: I.P.Perry@hull.ac.uk http://itsy.co.uk/ac/0405/Sem1/44222_ISD/ Traditional Systems Development Systems Development Life Cycle (Anderson R G, 1989) Define Development Strategy Systems Analysis Systems Design Systems Development System and User Documentation System Implementation System Testing System Maintenance Structured Systems-Development ‘Classic’ SSADMStructured Systems Analysis Design Method Problems with these Approaches? Nothing! If you have a well defined problem that can be solved by a sequential process with a fixed number of separate stages. But! What if the Users are not exactly sure of what they want the system to do? What if the Implementors mis-interpret what the Users have asked for? What if the system needs to be delivered within a short timescale? Dynamic Systems Development Method / What is DSDM? The Dynamic Systems Development Method (DSDM) is a framework of controls for the development of Computer-based systems It is independent of any particular set of tools and techniques. It can be applied to Information Systems Development projects of any size. Is especially good for Information Systems Development projects with very short deadlines. DSDM - Continued The lifecycle which DSDM uses is BOTH ‘iterative’ and ‘incremental’. A move away from traditional systems development is essential if IT solution providers are to deliver working systems in the ever decreasing timescales demanded by businesses today. Even within a traditional systems development environment, advantage can be gained from using components of the DSDM approach: to ensure the right requirements are addressed. to reduce the time to delivery. When to use DSDM? The application should have its functionality reasonably visible through the user interface (screens, reports, etc.): to enable prototyping to be used to maximum benefit. The project should be able