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Introduction to SDLC: System Development Life Cycle

Introduction to SDLC: System Development Life Cycle. Dr. Dania Bilal IS 582 Spring 2009. Phase 1: Planning & Selection. Product identification and selection Product initiation and planning Identify potential development projects Classify and rank projects Select projects for development.

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Introduction to SDLC: System Development Life Cycle

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  1. Introduction to SDLC: System Development Life Cycle Dr. Dania Bilal IS 582 Spring 2009

  2. Phase 1: Planning & Selection • Product identification and selection • Product initiation and planning • Identify potential development projects • Classify and rank projects • Select projects for development

  3. Phase 2: Systems Analysis • Determine system requirements • Select appropriate methods to elicit system requirements from users of system • Interviews, focus groups, surveys, discussions, or other techniques

  4. Phase 3: Systems Design • Structure system requirements • Modeling processes • Develop data flow diagrams (DFDs) based on specific rules and guidelines that lead to accurate and well-structured process models. • Use DFDs to support analysis of IS

  5. Phase 3: Systems Design • Use modeling and/or other techniques to represent data • Process modeling – based on specifications • Conceptual data modeling – user oriented • Select best alternative design strategy using both qualitative and quantitative methods

  6. Phase 3: Systems Design • Design the human interface • Design the interaction (dialogue) • Build a prototype • Perform usability testing • Design the database

  7. Phase 4: System Implementation & Operation • Implement system: • Design specifications are turned into working computer code • Test code for errors and other problems • Use a sample data set

  8. Phase 4: System Implementation & Operation • Install system • Prepare documentation • Train users of the system • Provide support • Maintain system on a regular basis

  9. Software Engineering Process • Components • Methodologies • Techniques • Tools

  10. Methodologies • Approaches taken by system developers to develop the information system • Qualitative (e.g., interviewing users) • Quantitative (e.g., collect data via direct observations of users)

  11. Techniques • Based on methodology chosen • Qualitative vs. quantitative or both • Processes or procedures followed to gather data about current and/or potential users • Design interviews, observations, focus groups

  12. IS Tools • Computer-aided software engineering (CASE) • Used to develop the software • Draw diagrams, models, relationships among tasks, etc.

  13. Class Activity • Work in a group for 15 minutes • Examine the SDLC • Assess how the SDLC may apply to purchasing a product of your choice. This can be a house, car, computer, etc.

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