Agile vs. Waterfall Development
By: Nikki Dent
When it comes to software development, there are many different procedures or value systems that can be followed or drawn upon for workflow. Two development philosophies that are often talked about and compared are agile and Waterfall. Waterfall is a methodology that’s meant to be followed to a T, while agile is a mindset.
It’s often thought that Waterfall is steady with fewer mistakes and agile is fast but with a lesser quality outcome. While it’s true that Waterfall is slower and methodical and agile is faster-paced and nimble, we don’t agree with the perceived outcomes. While there are pros and cons to each method depending on your organization and project, we have found agile to be the best way to work given the complex nature of today’s software projects. Read our comparison of the two philosophies and see if you agree.
What is Waterfall?
Waterfall is also known as a “traditional” development method and is very linear and sequential. In a Waterfall project, requirements are extensively gathered at the beginning of a project and then each stage of development is fully completed before you move on to the next stage. Typically, once you begin a new stage, you also can’t move backward to a past stage without going all the way back to the beginning.
With such a linear structure, following the Waterfall methodology is easy. It’s clear when each step is completed and the whole team knows what to work on next. It also provides clear deliverables to stakeholders along the way. The nature of the framework also necessitates a high level of documentation, which can be a huge pro. When you hit the end of the project, there will be documentation of all the work completed and the logic used which can be helpful in future maintenance of the software.
With so much focus at the beginning of the project on requirements gathering, it becomes easy to project timelines and to set deadlines. However, it can often be difficult to know all the requirements at the onset of a project and that can make compiling a full requirements list challenging. The biggest drawback of Waterfall is that it doesn’t easily accommodate change, and change is almost an inevitable part of software development. For example, if midway through a project you think of a new requirement, or if user feedback prompts a change to a feature, there is no easy way to make those changes without going back to the planning stage.
What Is Agile?
Agile software development is a thought process that believes in iterative development, which allows for learning as you go through a project. It forgoes in-depth planning at the beginning to remain nimble so changes can be made based on user feedback. Agile ideas are typically combined with a framework like Scrum, to help put them into practice.
Agile was conceived by a group of software developers in 2001, who met to rethink development methods. Together they wrote The Manifesto for Agile Software Development, which comprises of 4 rules and 12 principles describing how to work with more agility.
Working in an agile way has many benefits. A big advantage is how an agile mindset embraces change and the unknown. Unlike in Waterfall where all the requirements need to be written out upfront, agile thinking is okay with leaving the end goal of the project unknown and letting the software be fleshed out as you go. Instead of placing all your value in following a plan or rigidly fulfilling requirements, agile thought promotes using incremental releases to validate the purpose of the software and even to continually increase value based on customer feedback. These smaller iterations also make it possible to get high quality work done, quickly. As developers work on small pieces of software, they have the time and focus to make sure each piece is tested and that any bugs are fixed right away.
Following an agile mindset requires a knowledgeable team that’s ideally committed to the project for the duration. Where in a Waterfall project the extensive amount of documentation means that developers can be switched out mid-project, agile-style projects utilize less documentation, relying instead on the knowledge and expertise of the developers to make good value judgements. This knowledge is continually accumulated as they work on the project with the rest of the team. If your teams shift around frequently and you don’t think that you can commit to keeping the same developers on one project, then working in an agile way might not be a good fit. Additionally, with the propensity for change throughout agile-style projects, sometimes the finished product can look very different than the original idea, which could be considered a drawback, but when agile is done right the process often leads to a better result than originally planned.
Which Is Right for You?
All in all, Waterfall is a more rigid development plan, where agile thought believes in a flexible series of iterations and repetition. Waterfall development is best suited to projects where all aspects of the project are known upfront or in situations where you don’t have any flexibility in the requirements. However, knowing all the requirements upfront is not how most modern software projects work. Far more often more of the project is unknown that known at the onset, and it’s in those situations where an agile mindset shines. Even if you have all the requirements upfront, there will be changes that occur along the way, and an agile mindset is much more capable of embracing that change.
In the end, both methods will lead to a complete project, but the real question is which way will produce the better solution for your end users. We feel strongly that by embracing change and being flexible an agile mindset will lead to the best outcome for your project. That’s why we only work in an agile way at Aptera.
If you want to learn more about agile development or if you’d like to work with an agile team on your next software project, let’s have a conversation.
Run Your Next Project with an Agile Mindset
Embrace change and iterative design when you work with an agile team. Talk to our team today to see how running an agile project with Aptera could improve your business.
About Nikki Dent
Nikki is a technical copywriter for Aptera. With a bachelor’s degree in writing from Saint Mary’s College, Notre Dame, Ind., she has been honing her craft of marketing copywriting for the past six years. In her role at Aptera, Nikki enjoys learning and writing about the technology and strategy at work across the company.