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Sep 1, 2019
Agile Model

Agile method proposes incremental and iterative approach to software design

The agile process is broken into individual models that designers work on

The customer has early and frequent opportunities to look at the product and make decision and changes to the project

Agile model is considered unstructured compared to the waterfall model

Small projects can be implemented very quickly. For large projects, it is difficult to estimate the development time.

Error can be fixed in the middle of the project.

Development process is iterative, and the project is executed in short (2-4) weeks iterations. Planning is very less.

Documentation attends less priority than software development

Every iteration has its own testing phase. It allows implementing regression testing every time new functions or logic are released.

In agile testing when an iteration end, shippable features of the product is delivered to the customer. New features are usable right after shipment. It is useful when you have good contact with customers.

Testers and developers work together

At the end of every sprint, user acceptance is performed

It requires close communication with developers and together analyze requirements and planning

Waterfall Model

Development of the software flows sequentially from start point to end point.

The design process is not broken into an individual models

The customer can only see the product at the end of the project

Waterfall model are more secure because they are so plan oriented

All sorts of project can be estimated and completed.

Only at the end, the whole product is tested. If the requirement error is found or any changes have to be made, the project has to start from the beginning

The development process is phased, and the phase is much bigger than iteration. Every phase ends with the detailed description of the next phase.

Documentation is a top priority and can even use for training staff and upgrade the software with another team

Only after the development phase, the testing phase is executed because separate parts are not fully functional.

All features developed are delivered at once after the long implementation phase.

Testers work separately from developers

User acceptance is performed at the end of the project.

Developer does not involve in requirement and planning process. Usually, time delays between tests and coding
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