The document discusses the RAD model and prototyping. The RAD model is an incremental software development process where components are developed in parallel. It has four phases: requirements planning, user design, construction, and cutover. Prototyping involves creating initial versions of the system to get user feedback and evolve the design before full development. There are two types of prototypes: throwaway prototypes that are not part of the final system, and evolutionary prototypes that are iteratively improved based on user feedback.

1. SOFTWARE
ENGINEERING
ASIF IDRISI
18018
RAKESH PENTA 18027

2. TOPIC
RAD MODEL
&
PROTOTYPING

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. RAD MODEL
PHASES IN RAD
 Requirements Planning phase
 User design phase
 Construction phase
 Cutover phase

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. 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. 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. 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. RAD MODEL
Diagram

10. RAD MODEL
Advantages
 RAD reduces the development time.
 Increases reusability of components.
 Greater Customer Satisfaction.
 Faster Delivery Time.
 Simple and Better Quality.

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. PROTOTYPING

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. 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. PROTOTYPI
NG
TYPES OF PROTOTYPE
1 Throwaway prototypes
2 Evolutionary Prototypes

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. 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. PROTOTYPI
NG
Diagram

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. 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.