1 / 57

Chapter 6 SYSTEMS DEVELOPMENT Phases, Tools, and Techniques

Chapter 6 SYSTEMS DEVELOPMENT Phases, Tools, and Techniques. STUDENT LEARNING OUTCOMES. SAVING LIVES THROUGH SYSTEMS DEVELOPMENT. Centers for Disease Control (CDC) tracks a wealth of information

leonora
Télécharger la présentation

Chapter 6 SYSTEMS DEVELOPMENT Phases, Tools, and Techniques

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 6SYSTEMS DEVELOPMENTPhases, Tools, and Techniques

  2. STUDENT LEARNING OUTCOMES

  3. SAVING LIVES THROUGH SYSTEMS DEVELOPMENT Centers for Disease Control (CDC) tracks a wealth of information Unfortunately, most of that information is stored in separate IT systems that do not communicate with each other

  4. SAVING LIVES THROUGH SYSTEMS DEVELOPMENT The CDC is using a service-oriented architecture (SoA) to integrate all those systems and information

  5. INTRODUCTION Information systems are the support structure for meeting the company’s strategies and goals Why new systems are created:

  6. INTRODUCTION • When developing a new system, you have 3 “who” choices… • Insourcing • Selfsourcing • Outsourcing

  7. CHAPTER ORGANIZATION • Insourcing and the SDLC • Component-Based Development • Selfsourcing • Prototyping • Outsourcing

  8. INSOURCING AND THE SDLC Systems development life cycle (SDLC) Also called a waterfall methodology

  9. SDLC Phases & Major Activities

  10. SDLC as a Waterfall Methodology

  11. Phase 1: Planning Planning phase Three primary planning activities: Define the system to be developed

  12. Phase 1: Planning Set the project scope Project scope Scope creep Feature creep Project scope document

  13. Phase 1: Planning Develop the project plan including tasks, resources, and timeframes Project plan Project manager Project milestones

  14. Phase 1: Planning Sample Project Plan

  15. Phase 2: Analysis Analysis phase

  16. Phase 2: Analysis Two primary analysis activities: Gather the business requirements Business requirements Joint application development (JAD)

  17. Phase 2: Analysis Prioritize the requirements Requirements definition document

  18. Phase 2: Analysis Take time during analysis to get the business requirements correct. If you find errors, fix them immediately. The cost to fix an error in the early stages of the SDLC is relatively small. In later stages, the cost is huge.

  19. Phase 3: Design Design phase Two primary design activities: Design the technical architecture Technical architecture

  20. Phase 3: Design Design system models Starting with design, you take on less of an active participation role and act more as a “quality control” function, ensuring that the IT people are designing a system to meet your needs

  21. Phase 4: Development Development phase Two primary development activities:

  22. Phase 5: Testing Testing phase Two primary testing activities: Write the test conditions

  23. Phase 5: Testing Perform the testing of the system Unit testing System testing Integration testing User acceptance testing (UAT)

  24. Phase 6: Implementation Implementation phase Two primary implementation activities Write detailed user documentation

  25. Phase 6: Implementation Provide training for the system users Online training Workshop training

  26. Phase 6: Implementation Choose the right implementation method Parallel implementation Plunge implementation Pilot implementation Phased implementation

  27. Phase 7: Maintenance Maintenance phase Two primary maintenance activities: Build a help desk to support the system users Provide an environment to support system changes

  28. COMPONENT-BASED DEVELOPMENT • The SDLC focuses only on the project at hand • Component-based development (CBD) • CBD focuses on

  29. Component-Based Development Methodologies Rapid application development (RAD) Extreme programming (XP) Agile methodology

  30. Rapid Application Development (RAD) Rapid application development (RAD) (also called rapid prototyping) – Prototypes are models of the software components The development team continually designs, develops, and tests the component prototypes until they are finished

  31. Rapid Application Development (RAD) Use already-existing software components Build new software components

  32. Extreme Programming (XP) Extreme programming (XP)

  33. Agile Methodology Agile methodology

  34. SoA – An Architecture Perspective • Service-oriented architecture (SoA) • All CBD methodologies adhere to an SoA • Services are the same as components, which are the same as small self-contained blocks of code • More in Chapter 7

  35. SELFSOURCING Selfsourcing (end-user development)

  36. Selfsourcing Approach

  37. Selfsourcing Approach

  38. Selfsourcing Advantages

  39. Selfsourcing Disadvantages

  40. The Right Tool for the Job End users must have development tools that:

  41. PROTOTYPING Prototype Prototyping Proof-of-concept prototype Selling prototype

  42. The Prototyping Process The prototyping process involves four steps:

  43. The Prototyping Process

  44. Advantages of Prototyping

  45. Disadvantages of Prototyping

  46. OUTSOURCING Outsourcing

  47. OUTSOURCING The main reasons behind the rapid growth of the outsourcing industry include the following:

  48. Outsourcing Options IT outsourcing for software development can take one of four forms:

  49. Outsourcing Options

  50. Outsourcing Process

More Related