Agile SDLC model

agile sdlc model

What is the Agile SDLC model?

Agile is the most popular and widely used software development framework. The main aim of the Agile SDLC model is to facilitate faster project completion. It is a combination of iterative & incremental process models. In the agile model, the software develops in multiple iterations or sprints, and at a time, one iteration is planned, developed, tested, and deployed to the customers.

The developers concentrate on the high priority requirements in the first iteration and then deploy to the customers. Based on the customer’s feedback, the requirements are enhanced/modified in further iterations. This process repeats until the achievement of the final desired quality product. Generally, one sprint or iteration lasts for about 2-8 weeks.

Steps involved in the agile SDLC model are:

  • Requirement gathering
  • Requirement Analysis
  • Design
  • Coding
  • Unit testing
  • Deployment
Agile SDLC model iterations

Popularly known Agile Methodologies are eXtreme Programming (XP), Scrum, Adaptive Software Development (ASD), Feature Driven Development (FDD), Dynamic Systems Development Method (DSDM), Crystal, and Lean Software Development (LSD).

When to use the Agile model?

The Agile model is mainly useful when

  • There is no clear picture of the final product
  • New changes need to be implemented
  • There are Unclear requirements/deliverables
  • Faster deployment of the product
  • Complex projects

Testing Phase in the Agile software development model

Agile Testing involves Testing from the customer’s perspective. The Testing starts early as soon as the code gets ready. So, the Testing occurs at the time of implementation, unlike the traditional Testing process. The tests are performed by the QA Team as well as the developers, and the Business Analysts. Here, Testing and feedback are a continuous process.

The following are the Agile Testing Methods.

  • Behavior Driven Development(BDD)
  • Acceptance Test-Driven Development(ATDD)
  • Exploratory Testing

Advantages and Disadvantages


  • Customer involvement

  • High Customer Satisfaction by rapid, continuous delivery of software

  • Less Risk

  • Saves Time & money

  • Suitable for both fixed and changing requirements

  • Improved Quality & Fast product delivery

  • Promotes teamwork and cross-training

  • Flexible and Easy to manage


  • Documentation could get lengthy and sometimes can be ignored

  • Requires more committed, dedicated & skilled team for faster delivery of the product

  • It is not useful for small projects

  • It requires experts to make crucial decisions in the meeting

  • Unclear requirements might mess up the project

  • Scope of increase in the budget

   At QAonCloud, we provide testing services based on your SDLC model  and your requirements.