Lecture Exam Monday, March 27th 5:30 – 6:30 l bring a blue bubble sheet l lab sections 10, 11, 12 take test in Classroom Building 302 l lab sections 13, 14, 15 take test in Classroom Building 304 l lab sections 16, 17 take test in Classroom Building 306 l lab sections 19, 20 take test in l Classroom Building 308
Systems Development
l the process of: »analyzing an applications environment »designing a new system or modifying the existing system »acquiring the hardware and software »getting the new system to work
Responsibility for Systems Development l Information Systems Department l Outsourcing
Systems Analyst l analyzes and designs information systems l act as an intermediary between: »users of the system »management of the organization »information professionals
Systems Development Life Cycle l traditional approach to system development l structured, step by step process l especially useful for large scale TPS or IS development
Steps in the System Development Life Cycle l Preliminary investigation »investigate the problem by meeting with managers and users »define the problem and the scope of the project
Steps in the Systems Development Life Cycle l Feasibility Study »determine whether or not the problem can be solved within the budgetary constraints »process: –study and develop a model of existing system –develop alternate solutions –prepare a cost/benefit analysis for proposed system –recommend a course of action
Steps in the Systems Development Life Cycle l Analysis »determine what must be done to solve the problem »develop a logical model of the new system »produce the Functional Specifications Document
Steps in the Systems Development Life Cycle l System Design »develop a physical design of the proposed system that includes its actual parts »considerations –output and input –storage –processing –system controls –personal and procedures
Steps in the Systems Development Life Cycle l Acquisition/Programming »select and acquire hardware and software »RFP and RFQ »Software: purchase or program decision l cost l errors l time l technical support
Steps in the Systems Development Life Cycle l Implementation »converting to the new system hardware and software »testing »converting the data »training »documentation
Steps in the Systems Development Life Cycle l Maintenance »ensure the system continues to work properly and is updated as needed »software maintenance –programmers spend almost 70% of their time maintaining existing systems »hardware maintenance »ease of maintaining a system depends on the system documentation
Rapid Applications Development (RAD) l Prototyping »developing working models of the new system in a series of graduated steps l works well for small systems
Prototyping
Rapid Applications Development (RAD) l End-User Development »user develops specialized software applications to meet specific needs »user is primarily responsible for the development of the system rather than a computer professional