Iterative Waterfall Model in SDLC

Learn Iterative Waterfall Model | Software Engineering

Iterative Waterfall is basically a replacement of Classical Waterfall Model.

Classical Waterfall Model is hard to use, so Iterative Waterfall Model is introduced after making certain necessary changes in the Classical Model. It’s basically identical to the classical waterfall approach, with a few tweaks to improve software development productivity. 

The fundamental distinction between the iterative waterfall model and the classical waterfall model is that the iterative waterfall model provides feedback pathways from each step to the phases before it.

Interative Waterfall Model: Feedback Pathways

Iterative Waterfall Model in SDLC

 Phases of Iterative Waterfall Model :-

  1. Requirement Analysis
  2. Feasibility Study
  3. Software Design 
  4. Coding/Implementation
  5. Software Testing
  6. Software Deployment
  7. Software Maintenance

Phase Containment Errors

Phase containment of errors is the notion of discovering errors as close to their places of commitment as possible.
It is preferable to discover errors while they are still being committed. It cuts down on the time and effort required to fix errors.

Advantages of Iterative Waterfall Model

Feedback Path:

There are no feedback pathways in the classic waterfall model, hence there is no mechanism for error correction. However, in the iterative waterfall approach, the feedback channel from one phase to the previous phase allows for the correction of errors, and these changes are mirrored in subsequent phases.


The iterative waterfall model is straightforward to comprehend and apply. As a result, it’s one of the most popular software development models.

Well Organized:

Due to less time consumption this model is beneficial as you can focus more on designing and development.

Cost Effective

Changing the plan or requirements in the model is very cost-effective. Furthermore, it is ideally suited for dynamic businesses.

Disadvantages of Iterative Waterfall Model

Restricted Customer Interactions:

In this model the customer interaction is very least which may cause as the final developed software may vary from the customers actual required software.

Change requests are difficult to incorporate – :

According to this model you will have to enter all the requirements before starting the software. If customer wants to change something in between of the development then there is no scope to incorporate any change.

Long time process :

There is no scope of intermediate delivery.  Customer will have to wait for a longtime to get their software.

Overlapping is not supported:

You cannot overlap phases like Real time Project. You will have to wait for completion of phase to start another phase.

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