Topic: Rapid Application Development (RAD) Model

Message

    The RAD modelis a linear sequential software development process that emphasizes an extremely short development cycle. The RAD model is a "high speed" adaptation of the linear sequential model in which rapid development is achieved by using a component-based construction approach. Used primarily for information systems applications, the RAD approach encompasses the following phases:

1. Business modeling

The information flow among business functions is modeled in a way that answers the following questions:

What information drives the business process?
What information is generated?
Who generates it?
Where does the information go?
Who processes it?

2. Data modeling

The information flow defined as part of the business modeling phase is refined into a set of data objects that are needed to support the business. The characteristic (called attributes) of each object is identified and the relationships between these objects are defined.

3. Process modeling

The data objects defined in the data-modeling phase are transformed to achieve the information flow necessary to implement a business function. Processing the descriptions are created for adding, modifying, deleting, or retrieving a data object.

4. Application generation

The RAD model assumes the use of the RAD tools like VB, VC++, Delphi etc... rather than creating software using conventional third generation programming languages. The RAD model works to reuse existing program components (when possible) or create reusable components (when necessary). In all cases, automated tools are used to facilitate construction of the software.

5. Testing and turnover

Since the RAD process emphasizes reuse, many of the program components have already been tested. This minimizes the testing and development time.

Author	Message
Leela Groupie Joined: 27Apr2007 Online Status: Offline Posts: 43	Topic: Rapid Application Development (RAD) Model Posted: 04Jun2007 at 3:35am
	The RAD modelis a linear sequential software development process that emphasizes an extremely short development cycle. The RAD model is a "high speed" adaptation of the linear sequential model in which rapid development is achieved by using a component-based construction approach. Used primarily for information systems applications, the RAD approach encompasses the following phases: 1. Business modeling The information flow among business functions is modeled in a way that answers the following questions: What information drives the business process? What information is generated? Who generates it? Where does the information go? Who processes it? 2. Data modeling The information flow defined as part of the business modeling phase is refined into a set of data objects that are needed to support the business. The characteristic (called attributes) of each object is identified and the relationships between these objects are defined. 3. Process modeling The data objects defined in the data-modeling phase are transformed to achieve the information flow necessary to implement a business function. Processing the descriptions are created for adding, modifying, deleting, or retrieving a data object. 4. Application generation The RAD model assumes the use of the RAD tools like VB, VC++, Delphi etc... rather than creating software using conventional third generation programming languages. The RAD model works to reuse existing program components (when possible) or create reusable components (when necessary). In all cases, automated tools are used to facilitate construction of the software. 5. Testing and turnover Since the RAD process emphasizes reuse, many of the program components have already been tested. This minimizes the testing and development time. Post Resume: Click here to Upload your Resume & Apply for Jobs

	IP Logged


One Stop Testing Forum : Quality Assurance @ OneStopTesting : Software Process Improvement