RAD model

What Is RAD Model-Definition, Phases, Use, Advantages And Disadvantages

What is RAD model?

Definition: The RAD model means Rapid Application Development model. This SDLC model is a combination of prototyping and iterative development processes without any specific planning. The main focus of Rapid Application Development model (RAD) is to gather the requirements from the customers through prototypes and continuously deliver them using the iterative model.

What is RAD Model Phases in software engineering?

In software engineering RAD Model has main 6 Phases are shown below:

RAD Model Design

It has various phases such as analysis, designing, coding, and testing into a series of iterations.

Business Modeling

In this phase, the main focus is on the business information. To collect business information from the clients and products is developed as per the business information.

Data Modeling

After collecting business information, all the information is reviewed and analyzed by the experts and set the data objects important for the business. All the attributes of the data set are identified and defined as per the business information. 

Processing Modeling

In this phase, the main focus is on converting the data modeling phase into business information to achieve a business model. There are some processes used in this model like adding, deleting, retrieving, or modifying the data.

Application Generation

The main system is developed in this phase. Coding is done by the developers with the help of automation tools to convert the process and data into actual prototypes.


The last phase of the model is Testing, all the data flow and interfaces between all modules are tested by the test engineers and signed off for deployment. Due to unit testing is done by the developer side, there is less risk of critical and major defects.

Why is the RAD model used?

  • When we have well-known requirements of customers.
  • We use this model when technical risk is not high.
  • When we have a limited time period for modularizing to make the system.

RAD Model Advantages and Disadvantages

This model is reduced the time of development and also reuses the components of development in software testing. However, this model is needed skilled resources to achieve the targeted prototype for the customer. RAD Model Advantages and Disadvantages are shown below:

RAD Model – Advantages:

  1. It increases the reusability of components.
  2. It reduces the time of development.
  3. The progress of the project can be measured.
  4. It encourages the feedback of customers.
  5. Productivity with a small team in a short time.

RAD Model – Disadvantages:

  1. Depends on a strong development team for recognizing the business requirements.
  2. The main requirement is a highly skilled development team.
  3. It is highly dependent on modeling skills.
  4. The management is more complex.
  5. Customer involvement is required throughout SDLC.
  6. This is mostly for projects which require a short time.


So in this way, This model is used for software development. It has a step-by-step process to develop software. If you are looking for more SDLC model tutorials then please visit below the links. 

SDLC Tutorials

1. SDLC – V Model

2. SDLC – Waterfall Model

3. SDLC – Agile Model

4. SDLC Models

Scroll to Top