Rapid Application Development (RAD) is an iterative software development process that aims to develop software quickly. It was developed by IBM in the 1980s. RAD uses component-based development, with multiple teams working in parallel on discrete components. The RAD process has four phases: requirement planning, user design, construction, and cutover. In the requirement planning phase, user needs are discussed. The user design phase involves interactive modeling and prototyping. Construction focuses on programming and testing. Cutover implements the new system and trains users. RAD allows for faster delivery but requires skilled teams and commitment to its rapid cycles.

1. (RAD)
RAPID APPLICATION
Development
BY MALAIKA TARIQ

2. DEFINATION:
 Abbreviation of Rapid Application Design
 It is an adoption of water fall model
 It was developed by IBM in 1980’s
 It aims at developing a software in a short span of time
 In RAD rapid development is achieved by using component based
development
 Multiple teams are working parallel on discrete components

3. Phases of RAD
We can divide RAD into 4 main steps:
1. requirement planning phase
2. user design phase
3. construction phase
4. cutover phase

4. Requirement planning phase
 Users ,managers and It staff members discuss on business needs.
 They discuss on system requirements.
 They also discuss project scope.
 Decides how to generate the software and what it will do.
 It ends when the tram agrees on the key issues and obtain
management authorization to continue.

5. User design phase
 It is also called modeling phase.
 It is a continuous interactive process.
 During this phase ,user interact with software model and develop
model and prototypes that represents all system processes , inputs ,
and output.
 Allow us to understand and modify the system.
 JAD (Joint Application Development) type system for
interaction…..collaborative interaction.
 Approve a working model of system.

6. Construction phase
 Focuses on program and application development task.
 User continue to participate and suggest changes and
improvements.
 Tasks are
* Programming and application development
* Coding
* Unit integration.
* System testing.

7. Cutover phase
 It is the final task.
 Resembles the final task in SDLC Implementation phase.
 Its tasks are…….
*data conversion.
*full scale testing.
*system changes as old and new system run
parallel until old system is phased out and
new system is approved.
*user training.
 In this phase new system is built and delivered.

9. RAD Strength
 Reduce time development.
 Greater customer satisfaction.
 Faster delivery time.
 Improved and better quality.
 Continuous customer involvement.

10. RAD Weaknesses
 Requires highly skilled and well trained developers.
 Require sufficient human resource to create the right
number of RAD Team.
 Developers and customers must be committed to
rapid-fire activities in an abbreviated time frame.
 Don’t use if technical risks are high.

11. Object Oriented System
Analysis
(OOSA)

12.  Another type of system development method.
 It is a method that is applied for finding the needs analysis and
affect the subsequent phases.
 Creates entities called objects and then establish relation ship
between the objects.
 For example in case of the need analysis of point of sale system ,
each item to be sold is an entity
 Each item is defined as an object and each object is assigned
attributes.
 In this case attributes could be price , color , size , or any other
characteristic.
 Next relationships are established between the objects
 For example the item must be moved to inventory once it comes
into store and must be moved out when sold.

13.  At the time of sale the sale associate perform the sale
transaction
 In this way relationships are established and model is
created
 Help best to break up the project into smaller pieces
and assigned to different teams.
 The developing teams may use conventional
programming tools or other tools such as JAVA.