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RAD Model & Prototyping Of Software Engineering

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RAD Model & Prototyping Of Software Engineering

  1. 1. SOFTWARE ENGINEERING ASIF IDRISI 18018 RAKESH PENTA 18027
  2. 2. TOPIC RAD MODEL & PROTOTYPING
  3. 3. RAD MODEL WHAT IS RAD ???  RAD model is Rapid Application Development model.  It is a type of Incremental model.  In RAD the Components are developed in parallel Manner.  It is a faster software development process.
  4. 4. RAD MODEL PHASES IN RAD  Requirements Planning phase  User design phase  Construction phase  Cutover phase
  5. 5. RAD MODEL 1. Requirements Planning phase  Users, managers, and IT staff members discuss on Business needs.  They discuss on System requirements.  They also discuss on Project scope  It decide who will generate software.  It tells what software will do.
  6. 6. 2. User design phase RAD MODEL  It is also called as Modeling phase.  User Design phase is a continuous interactive process.  During this phase, users interact with software model.  It allows users to understand, modify the System.  It approve a working model of the system that meets their needs.
  7. 7. RAD MODEL 3. Construction phase  Focuses on program and application development task.  Tasks are * Programming and application development, * Coding, * Unit-integration and * System testing.
  8. 8. RAD MODEL 4. Cutover phase  It is the final ( Phase ) tasks in the System Development Life Cycle (SDLC).  Its tasks are * Data conversion, * Full-scale testing, * System change over, * User training.  In this phase the new system is built, and delivered.
  9. 9. RAD MODEL Diagram
  10. 10. RAD MODEL Advantages  RAD reduces the development time.  Increases reusability of components.  Greater Customer Satisfaction.  Faster Delivery Time.  Simple and Better Quality.
  11. 11. RAD MODEL Disadvantages  Requires highly skilled developers/designers.  RAD is not appropriate when technical risk are high.  Cant use for small projects.  Absence of reusable component can lead to failure of the project.
  12. 12. PROTOTYPING
  13. 13. PROTOTYPI NG  A prototype is the sample implementation of the real system.  A prototype is a toy implementation of the system.  It shows limited and main functional capabilities of the proposed system.  The customer provides suggestion and improvements on the prototype.  A prototype is a model or a program which is not based on strict planning.
  14. 14. PROTOTYPI NG  After a prototype is built, it is delivered to the customer for the evaluation.  It helps the customer determine how the feature will function in the final software.  It is a very useful technique to obtain accurate requirements of the system.
  15. 15. PROTOTYPI NG TYPES OF PROTOTYPE 1 Throwaway prototypes 2 Evolutionary Prototypes
  16. 16. PROTOTYPI NG Throwaway Prototypes  Prototype developed as part of a throw-away approach.  It will not form part of the final solution.  It is a useful way of exploring ideas, and gaining feedback from user.
  17. 17. PROTOTYPI NG Evolutionary Prototypes  It is initial prototype is presented to user.  They Provide feedback and suggestion for improvement.  Each stage of this prototype evolves toward the final system hence it is called as Evolutionary Prototype
  18. 18. PROTOTYPI NG Diagram
  19. 19. PROTOTYPI NG Advantage  Users are actively involved in the development.  Errors can be detected much earlier.  Missing functionality can be identified easily.  It reduces risk of failure.
  20. 20. PROTOTYPI NG Disadvantage  It is a slow process.  It is not complete model.  It is time consuming model.  It should be developed or built on company's cost.

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