What are the advantages of RAD modelling language?

Answer 1

Advantages of UML:

• it provides most of diagram types (14 diagrams in UML 2.2) needed for object-oriented analysis and design (OOAD)
• it is standardized (by OMG Group), not proprietary, supported by software industry
• is explained and described in every aspect by vast amount of publications, resources, textbooks, etc.
• it could be customized and extended for specific application domain, software process, or implementation platform.

Answer 2

Rapid application development is a software development methodology, which involves iterative development and the construction of prototypes. It is a merger of various structured techniques, especially the data driven Information Engineering with prototyping techniques to accelerate software systems development

Advantages of the RAD methodology:

1. Flexible and adaptable to changes.
2. Prototyping applications gives users a tangible description from which to judge whether critical system requirements are being met by the system. Report output can be compared with existing reports. Data entry forms can be reviewed for completeness of all fields, navigation, data access (drop down lists,checkboxes, radio buttons, etc.).
3. RAD generally incorporates short development cycles - users see the RAD product quickly.
4. RAD involves user participation thereby increasing chances of early user community acceptance.
5. RAD realizes an overall reduction in project risk.
6. Pareto's 80 - 20 Rule usually results in reducing the costs to create a custom system.

Disadvantages of RAD methodology:

1. Unknown cost of product. As mentioned above, this problem can be alleviated by the customer agreeing to a limited amount of rework in the RAD process.
2. It may be difficult for many important users to commit the time required for success of the RAD process.

Answer 3

Advantages of the RAD model:

§ Reduced development time.

§ Increases reusability of components

§ Quick initial reviews occur

§ Encourages customer feedback

§ Integration from very beginning solves a lot of integration issues.

Disadvantages of RAD model:

§ Depends on strong team and individual performances for identifying business requirements.

§ Only system that can be modularized can be built using RAD

§ Requires highly skilled developers/designers.

§ High dependency on modeling skills

§ Inapplicable to cheaper projects as cost of modeling and automated code generation is very high.