Systems overview sdlc


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Systems overview sdlc

  1. 1. Project By :Mr.Sagar Ajit WaghelaWRO0396086Mr. Nikhil SharmaWRO0362416
  2. 2. We Would Like to 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. 3. What is an information 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. 4. What are the phases of the system development cycle? Phase 2. Analysis  Conduct preliminary investigationPhase 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. 5. What are guidelines for 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. 6. Who participatesin the systemdevelopment lifecycle?
  7. 7. What is a systems analyst ? Responsible for designing and developing information system Liaison between users and IT professionals
  8. 8. What is the project 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. 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. 10. What is documentation? Collection and summarization of data and information Includes reports, diagrams, programs, and other deliverables
  11. 11. What are six data and information gathering techniques? Review documentation Observe Questionnaire Interview Joint-application design (JAD) session Research
  12. 12. What are some reasons to create or modify aninformation system? To correct problem To improve in existing system existing system Outside group may Competition can mandate change lead to change
  13. 13. What is a request for system services? Formal request for new or modified information system  Also called project request
  14. 14. What is the planning 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. 15. What is the analysis phase? Conduct preliminary Perform detailed investigation, also analysis called feasibility study
  16. 16. What is the preliminary 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. 17. What is detailed analysis? 1. Study how current system works 2. Determine user’s wants, needs, and requirements 3. Recommend solution Sometimes called logical design
  18. 18. What is thesystem proposal? 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. 19. What are possible solutions? 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. 20. What is the design 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. 21. What is needed to 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. 22. What are three basic documents used to summarizetechnical 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. 23. How do systems analysts test software products? References from vendor Talk to current users of product Product demonstrations Trial version of software Benchmark test measures performance
  24. 24. What is a detailed 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. 25. What is a mockup? Sample of input or output that contains actual data
  26. 26. What is a prototype? Working model of proposed system Beginning a prototype too early may lead to problems
  27. 27. What is computer-aided software engineering (CASE)? Software tools designed to support activities of system development cycle
  28. 28. What is the implementation 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. 29. What are the three types of tests performed bysystem 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. 30. What is training? Showing users exactly how they will use new hardware and software in system
  31. 31. What is the support 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