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Agile VS Waterfall: A Complete Comparison

> Basic Diagram Knowledge > Agile VS Waterfall: A Complete Comparison
Posted by James Freeman | 12/23/2019
With many project management software swarming the Internet, Agile and Waterfall methodologies are the most popular methods. However, they can be confusing at times and hence we try to straighten them up in detail.

Introduction

The Agile methodology is a project management tool in which the project team manages the project by dividing it into several stages. It involves constant collaboration with the stakeholders and non-stop improvement and iteration at every step.


The Waterfall methodology is a kind of model that breaks down project activities into systematic linear sequences; hence, it’s also called the linear-sequential life cycle model. In this methodology, the subsequent phases rely on the deliverables of the previous one and correspond to the specialization of tasks.

Agile model and Waterfall model

Similarities Between Agile and Waterfall

Before delving into what sets Agile and Waterfall apart from each other, there is a list of what they have in common below.

  • They have similar goals, which are to produce high-quality software applications and make clients happy and content.
  • They perform the same activities, which include collecting requirements, designing, developing, testing, and deploying.
  • The foundation of a project involves planning, bringing the project to life, and monitoring the project’s progress in the two methodologies.

Differences Between Agile and Waterfall

  • Analysis of feasibility
  • In Waterfall methodology, this process takes quite a lot of time to prevent reworking in the following phases of the project. It involves analyzing cost and benefit to determine if the plan is financially, technically, and operationally achievable. At times it may lead to a business case.

    In Agile project management, however, this takes as little time as possible. You can contact clients in good time in the first stages of the project and settle the project requirements and task details.

  • Planning process
  • In Waterfall project management, planning in detail is very crucial and is done just once. It allows them to achieve the set goals of the project without making any alterations to the requirements or scope of the project. You can track the formulated plan at the beginning of the project in the entire project progress after it’s set the baseline. You can make no change.

    Planning in Agile methodology is not done in advance but when the team is prepared to take on a particular set of the requirements and begin to outline the development. In this case, planning is an ongoing process since the team works on an active sprint. Changing the plan is allowed, but you cannot add new requirements to an active sprint.

  • Monitoring and tracking processes
  • In Waterfall methodology, you can monitor the project’s progress. Frequent status reviews are carried out to analyze the development. Afterward, the status reports will be sent to the management team and the project sponsors. The project managers also make weekly/monthly reports of status and share them with the stakeholders.

    In Agile methodology, it is different as the progress gets measured in each sprint. The project team does this, then the sprint reports are handed over to the stakeholders. Another way of tracking project progress is through the demo of the built functionality.

  • Roles delegation
  • In Waterfall methodology, project team members get assigned particular tasks, and one can work on only their delegated role. It is not up for any change whatsoever in the project life cycle. For example, a developer-only takes care of development tasks and cannot handle any other work.

    In Agile project management, on the contrary, the teams are self-organizing and can switch roles among themselves. Or they can work in cycles, for example, a developer can assist a tester in the testing process. There is only a case of scrum master exception in which you can swap with the project manager.

Agile and Waterfall comparision list

The Comparison between Agile and Waterfall

Next, we’ll see what makes these methodologies unique and their pros and cons.

Agile

a) What makes it stand out?

Agile is a project management tool that majors on collaboration, adaptive planning, and continuous improvement. It has precise principles such as:

  • Brief but detailed feedback loops.
  • Enhanced and purposeful collaboration.
  • Creation of shippable enhancements and upgrades of output.
  • Openness.

b) Pros of Agile

  • Output delivery is never slackening.
  • After every sprint, the working features of the software are sent to clients hence making them content and confident in the production.
  • The frequent and open interaction with customers enables them to get a follow-up of the working features that meet their desires and requirements.
  • Changes can be accommodated in the current version of the product whenever clients bring them up.
  • A lot of emphases are put on how to best design the software.
  • If needed, changes in the project requirements are possible in later phases of the project development.

c) Cons of Agile

  • Very less documentation.
  • Predicting the result can be tough when outlined requirements aren’t clear.
  • It is ought to estimate the efforts required at the beginning of the software development life cycle.
  • It is vulnerable when faced with unknown risks that can affect the project progress.

d) Agile example

Scrum is a famous and widely-used example of Agile methodology.

Agile methodology

Waterfall

a) What makes Waterfall stand out?

It has the following features:

  • It has a linear sequence in which the next phase depends on the successful completion of the previous one.
  • It is based on three principles: extensive documentation, minimum client participation, and sequential structure of project implementation.

b) Pros of Waterfall

  • It has well detailed and reliable time and budget estimates.
  • The development process is more secure with a strong foundation.
  • It has extensive documentation.
  • It is a straightforward project management tool that’s precise and commendable for small projects with well-understood needs.
  • It is easy to manage due to its tight and rigid model.
  • Its project phases are well defined, and tasks can easily be arranged.

c) Cons of Waterfall

  • It is considered to be a rigid and inflexible process. Since it’s done, changes on requirements of the project are not allowed and roles are not switchable.
  • Unforeseen problems and hurdles need pretty much time, money, and human resources to deal with. It affects the overall output severely.
  • It lacks regular meetings and communication. Hence, you need to feedback and test in the last phase of the project.

d) Waterfall example

A common Waterfall model example is the Software Engineering model.

Waterfall methodology

Agile VS Waterfall: Which one should you use?

Before adopting Agile or Waterfall, it is wise to consider factors such as:

  1. Project requirements and regulations. Does the project consist of precise regulatory requirements without any future changes? Yes: choose Waterfall. No: use Agile.
  2. Stringent organizational processes. Does the firm have strict project processes that one must follow them? Yes: use Waterfall. No: use Agile.
  3. Client participation in project progresses. Do clients require an update of the project process frequently? Yes: choose Agile. No: select Waterfall.
  4. Nature of the project. Is it an already existing product that requires some upgrading? Yes: use Waterfall. No: choose Agile.
  5. Time scope of the project. Is the project deadline set and cannot be altered in any situation? Is the period short? Yes: use Waterfall. No: use Agile.
  6. Budget of the project. Is it already drawn up and inflexible? Yes: use Waterfall. No: use Agile.

Now, is there a way that you can use these two development methodologies to work on a single project? Yes, and you can find out the answer in the Agile-Waterfall Hybrid example below.


To deliver a solution in a way that wisely utilizes time, team members, and other resources to meet the demands of the customers, Edraw Max, a multi-management platform, provides the hybrid Agile-Waterfall method example.


They achieve this by:

  1. Gathering and filing all project requirements up first and foremost.
  2. Designing the project model.
  3. Going into the development phase of a software or product.
  4. Testing the product when the development is complete.
  5. Receiving feedback on what has been created up to this particular project stage.
  6. Making changes according to the feedback until a perfect output is realized.
  7. Deploying the product and getting the final outcome.

Agile-Waterfall Hybrid example

Conclusion

In this article, we have looked at Waterfall methodology and Agile methodology. The table displays the differences and similarities between these two methodologies at a glance.

Also, the article gives you a guideline on getting the appropriate project software based on the nature of the project.

Finally, you can use Waterfall methodology and Agile methodology to achieve an exceptional output of your project called the Agile-Waterfall Hybrid method.

Want to Know More about Agile and Waterfall?

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