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Iterative Model


In software engineering, there are several models designed to develop software from scratch to final product delivery. The stated model ‘Iterative Model’ is one the most applied approaches, which incorporates the foundation of software and supplies integrated services and usability. An iterative model may be defined as the process which does not starts with complete specification of requirements but begins with a limited set of resources and iteratively pursue the whole process until the team meets the required objective. Actually, breaking a large development into small processes leads higher productivity in less time. This method is applied in large development processes.

In software development, each model is introduced to develop valuable and work-specific products or tools. In such a way, using Iterative model makes a development quite effective and functional-oriented. The model starts with small set of requirements which takes small amount of time to get-started. This methodology reduces Regression Testing and provides Incremental approach.

Phases of Iterative Model:

An Iterative model is designed in a cycle structured format, in which various modules are participated to provide better functionality. There are four essential phases in the cyclic form which are follows as:

Iterative Model image

  1. Requirements: All functional and customer’s requirements are responsible to design & develop quality products or applications.
  2. Design & Development:In this module, software applications are being designed and developed by the developing team.
  3. Testing: After software development, the whole developed module should be tested by testing team and timely maintain the documentation of errors.
  4. Implementation: In this section, errors or bugs are rectified by developers and implement the improvised functionality.

Advantages of Iterative Model:

  • The functionality of the software can be developed quickly.
  • Results can be obtained faster.
  • The current progress can be measured easily.
  • Testing and debugging becomes simpler and effective.
  • Risks are easily diagnosed during a process.
  • The whole process is more effective for large scale and critical projects.

Disadvantages of Iterative Model:

  • It requires constant focus on team management to ensure complexity.
  • At the end, architecture and design related issues may arise, because all the requirements are not gathered at the beginning of the development cycle.
  • At the end, architecture and design related issues may arise, because all the requirements are not gathered at the beginning of the development cycle.
  • This whole model is not suitable for small projects.
  • Highly qualified and experienced resources are required for effective risk analysis.

Applications of Iterative Model:

  • The requirements of the system become easier to defined and completely understood by the skilled professionals.
  • All essential requirements defined at the initial stage of development. Otherwise, functionalities or major improvements may arise in future.
  • By using new technologies, new lessons are revealed which helps development team to learn something new in every project.
  • The risks and goals expectations may change in future.
  • Conclusion:

    When a tester or testing team adapt this approach by analyzing and gathering all the requirement specifications, and then apply in significant module, it produces required outcome. This impressive implementation is efficient and time saving, which reduces the need of regression testing and minimizes the effort.