In this post, we will understand the difference between agile and waterfall models −
It separates the project development lifecycle into multiple sprints.
It uses an incremental approach
It is flexible.
It can be understood as a collection of multiple different projects.
Changes can be made in project development requirements after initial planning has been completed.
It follows an iterative development approach.
The process of planning, development, prototyping and software development phases can appear multiple times.
The test plan is reviewed after every sprint.
The requirements may change and evolve.
The process of testing is performed concurrently with software development.
It uses a product mindset where software product would satisfy the requirements of end customers.
It can be changed based on the demands of the customers.
It works well with time and materials, i.e non-fixed funding.
It would increase the amount of stress in fixed-price scenarios.
It is preferred to work with small and dedicated teams with high amounts of coordination and synchronization.
Products owner with team prepares requirements just about every day during a project.
The test team can be a part of the requirements change.
The description of the project can be altered anytime during the development process.
The team members can be interchanged, hence work fast.
Project managers are not needed since project can be managed by the entire team.
Following is the representation of Agile Model −
The process of software development is divided into distinct phases.
It is a sequential design process.
It is a structured process, and may be quite rigid at times.
The software can be developed as one single project.
The requirements can’t be changed once the project development starts.
The project development phases such as designing, development, testing, are done only once in the waterfall model.
The test plan is not usually discussed during the test phase.
This method can be used for projects that have a definite set of requirements and doesn’t changes.
The ‘testing’ phase comes after the ‘build’ phase.
It shows a project mindset, and focuses on completing the project.
The risk is reduced since the price of contracts are fixed by getting the risk agreement in the beginning.
There is limited team coordination and synchronization.
Business analysis is done to prepare the requirement before beginning it.
It is difficult to initiate any changes in the requirements.
The process is generally straightforward hence project manager is required.
A project manager plays an important role in every stage of the development process
Following is the representation of Waterfall Model −