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Systems overview sdlc
The document provides an overview of an information systems project presented by Mr. Sagar Ajit Waghela and Mr. Nikhil Sharma. It thanks the ICAI for the opportunity and guidance provided. It then discusses key concepts in information systems including the system development life cycle, roles of various participants, and the main phases and activities involved in planning, analysis, design, implementation, and support of an information system project.
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Systems overview sdlc
- 1. Project By : Mr.SagarAjit Waghela WRO0396086 Mr. Nikhil Sharma WRO0362416
- 2. We Would Liketo take the opportunity to thank The ICAI for granting us to choose this Project from a Wide range of projects. ICAI is the Apex Institution Guiding us to the Right path and with this presentation , we are given an opportunity to
- 3. What is aninformation system (IS)? Hardware, software, data, Hardware, software, data, System—Set of components System—Set of components people, and procedures that people, and procedures that that interact to achieve that interact to achieve work together to produce work together to produce common goal common goal quality information quality information Businesses use many types of Businesses use many types of systems systems
- 4. What are thephases of the system development cycle? Phase 2. Analysis Conduct preliminary investigation Phase 1. Planning Perform detailed analysis activities: Phase 3. Design Review project requests Study current system Acquire hardware Prioritize project Determine user requirements and software, if requests necessary Recommend solution Allocate resources Develop details of Identify project system development team Phase 5. Support Phase 4. Implementation Conduct post-implementation Develop programs, if necessary system review Install and test new system Identify errors and enhancements Train users Monitor system performance Convert to new system
- 5. What are guidelinesfor system development? Arrange tasks into phases (groups of activities) Involve users (anyone for whom system is being built) Develop clearly defined standards (procedures company expects employees to follow)
- 6. Who participates in thesystem development life cycle?
- 7. What is asystems analyst ? Responsible for designing and developing information system Liaison between users and IT professionals
- 8. What is theproject team? Formed to work on project from beginning to end Consists of users, systems analyst, and other IT professionals Project leader—one member of the team who manages and controls project budget and schedule
- 9. What is feasibility? Operational feasibility Measure of how suitable system Four feasibility development tests: will be to the Schedule company feasibility Economic feasibility (also called Technical cost/benefit feasibility feasibility)
- 10. What is documentation? Collection and summarization of data and information Includes reports, diagrams, programs, and other deliverables
- 11. What are sixdata and information gathering techniques? Review documentation Observe Questionnaire Interview Joint-application design (JAD) session Research
- 12. What are somereasons to create or modify an information system? To correct problem To improve in existing system existing system Outside group may Competition can mandate change lead to change
- 13. What is arequest for system services? Formal request for new or modified information system Also called project request
- 14. What is theplanning phase? Begins when steering committee receives project request Steering committee— decision-making body for the company Function of committee: Form project Review and development Prioritize Allocate approve project team for each project requests resources requests approved project
- 15. What is theanalysis phase? Conduct preliminary Perform detailed investigation, also analysis called feasibility study
- 16. What is thepreliminary investigation? Determine exact nature of problem or improvement and whether it is worth pursuing Findings are presented in feasibility report, also known as a feasibility study
- 17. What is detailedanalysis? 1. Study how current system works 2. Determine user’s wants, needs, and requirements 3. Recommend solution Sometimes called logical design
- 18. What is the systemproposal? Assesses feasibility of each alternative solution Presented to Recommends steering the most committee, feasible which decides solution for how system will the project be developed
- 19. What are possiblesolutions? Horizontal market Horizontal market software—meets software—meets needs of many needs of many companies Buy packaged software—prewritten Buy packaged software—prewritten companies software available for purchase software available for purchase Vertical market Vertical market software—designed software—designed for particular industry for particular industry Write own custom software—software Write own custom software—software developed at user’s request developed at user’s request Outsource—have outside source Outsource—have outside source develop software develop software
- 20. What is thedesign phase? Acquire hardware and software Acquire hardware and software Develop all details of new or Develop all details of new or modified information system modified information system
- 21. What is neededto acquire new hardware and software? hardware and software requirements of new or Identify all modified system Talk with other Talk with other Surf Web systems analysts Read print and Visit vendors’ stores online trade journals, newspapers, and newspapers, and magazines magazines
- 22. What are threebasic documents used to summarize technical specifications? Vendor quotes Identifies Request for quotation (RFQ) price(s) for product(s) listed you want product(s) Vendor selects Request for proposal (RFP) product(s) that meet(s) your requirements and Less formal method then quotes price(s) that uses standard form to request information about Request for information (RFI) product or service
- 23. How do systemsanalysts test software products? References from vendor Talk to current users of product Product demonstrations Trial version of software Benchmark test measures performance
- 24. What is adetailed design? Detailed design specifications for components in proposed solution Includes several activities Database Database Input and Input and Program Program design design output design output design design design
- 25. What is amockup? Sample of input or output that contains actual data
- 26. What is aprototype? Working model of proposed system Beginning a prototype too early may lead to problems
- 27. What is computer-aidedsoftware engineering (CASE)? Software tools designed to support activities of system development cycle
- 28. What is theimplementation phase? Purpose is to construct, or build, new or modified system and then deliver it to users Convert to new system Train users Install and test new system Develop programs
- 29. What are thethree types of tests performed by system developers? Unit Test Systems test Verifies each Verifies all programs individual program in application work works by itself together Integration Test Verifies application works with other applications
- 30. What is training? Showing users exactly how they will use new hardware and software in system
- 31. What is thesupport phase? Provides ongoing assistance after system is implemented Conduct post-implementation system review—meeting to find out if information system is performing according to expectations Identify errors Identify enhancements Monitor system performance