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RAD model is Rapid Application Development model. It’s a type of incremental model. In Rapid Application Development model the components or functions are developed in parallel as though they were mini projects. The developments are time boxed, delivered and afterward gathered into a working prototype.
This can rapidly give the client something to see and use and to give feedback regarding the delivery and their prerequisites.
In this article, you will learn-
What is RAD Model?
Rapid Application Development Model or RAD is a software development process dependent on prototyping with no particular planning. In RAD model, there is less consideration paid to the arranging and more priority is given to the development tasks. It targets at developing software in a short span of time.
SDLC RAD modeling has following stages
• Business Modeling
• Data Modeling
• Process Modeling
• Application Generation
• Testing and Turnover
It focuses on input-output source and objective of the data. It emphasizes on conveying projects in small pieces; the larger projects are divided into a progression of smaller projects. The fundamental highlights of Rapid Application Development modeling are that it focuses on the reuse of templates, tools, process, and code.
Different Phases of RAD Model
There are following five significant phases of Rapid Application Development Model
| RAD Model Phases | Activities performed in RAD Modeling |
| Business Modeling | On premise of the flow of data and distribution between different business channels, the product is designed |
| Data Modeling | The data gathered from business modeling is refined into a set of data objects that are significant for the business |
| Process Modeling | The data object that is proclaimed in the data modeling stage is changed to accomplish the data flow important to carry out a business work |
| Application Generation | Automated tools are used for the construction of the software, to change over process and data models into prototypes |
| Testing and Turnover | As prototypes are individually tried during each iteration, the general testing time is decreased in RAD. |
When to use RAD Methodology?
• When a system should be produced in a short span on time (2-3 months)
• When the prerequisites are known
• When the user will be included all through the life cycle
• When technical risk is less
• When there is a need to create a system that can be modularized in 2-3 months of time
• When a budget is sufficiently high to afford designers for modeling alongside the expense of automated tools for code generation
Rapid Application Development Advantages and Disadvantages
| Advantages of RAD Model | Disadvantages of RAD Model |
| Flexible and Adaptable to changes | It can’t be used for smaller projects |
| It is useful when you need to reduce the general project risk | Not all application is viable with Rapid Application Development |
| It is adaptable and flexible to changes | At the point when technical risk is high, it’s not suitable |
| It is simpler to move deliverables as scripts, high-level abstractions and intermediate codes are used | In the event that developers are not dedicated to conveying software on schedule, RAD projects can fail |
| Because of code generators and code reuse, there is a decrease of manual coding | Decreased highlights because of time boxing, where highlights are pushed to a later version to complete a release in brief period |
| Due to prototyping in nature, there is a chance of lesser defects | Diminished scalability happens because a RAD developed application starts as a prototype and evolves into a completed application |
| Each stage in RAD conveys highest priority usefulness to client | Progress and issues accustomed are difficult to track as such there is no documentation to demonstrate what has been finished |
| With less individuals, productivity can be increased in brief time | Requires highly skilled designers or developers |
Summary
• Rapid Application Development full form or RAD represents: Rapid Application Development
• Rapid Application Development definition: Rapid Application Development model is a software development process dependent on prototyping with no particular planning.
Related:
Software Engineering Tutorial for Beginners: Learn in 7 Days
What is Software Engineering? Definition, Basics, Characteristics
10 Steps to Become a Software Engineer/Developer
Software Engineer vs Software Developer: What’s The Difference?
SDLC: Phases & Models of Software Development Life Cycle
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