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Difference between RAD Model and Waterfall Model

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  • Difficulty Level : Basic
  • Last Updated : 23 Aug, 2022
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Waterfall Model: 
Waterfall Model is also known as the Classical or Traditional Model. Sometimes It is referred to as the linear-sequential life cycle model because all phases involved in this model are completed one by one linearly. In this model, we get software after the completion of all coding phases. This model is used for small projects. There exist only one cycle in the waterfall model. 

 

RAD Model: 
RAD model stands for Rapid Application Development and it is the type of Incremental Model. It can’t handle large projects but it can handle small projects as well as medium projects. In the RAD model, any changes can be made at any stage but in the waterfall, it can’t happen. 

 

Difference between RAD Model and Waterfall Model:

S. No.Waterfall ModelRAD Model
1.Waterfall model known as Classical/Traditional Model.RAD stands for Rapid Application Development.
2.Planning is required in early stage.There is no such constraint in RAD model.
3.High assurance is what it aims for.Its objective is rapid development.
4.There is high amount risk in waterfall model.There is low amount risk in RAD model.
5.In waterfall model large team size is required.In RAD model small team size is required.
6.Waterfall model can’t handle large project.RAD model also can’t handle large project but usually it is preferred between large and small project.
7.Any changes can be made in waterfall model only at the beginning.Any changes can be made in RAD model anytime.
8.The product of Waterfall model is delivered after the completion of all stages.The product of RAD model is delivered as soon as possible.
9.There is long waiting time for running software in waterfall model.There is less waiting time for running software in RAD model, as its first version is released as soon as possible.
10.Waterfall model is not compatible with the change in client requirements.RAD model may work with the change in client requirements.
11.It is not flexible to changes.It is flexible to changes.
12.Customer control over the administrator is very less.Customer control over the administrator is more in comparison to waterfall model.
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