The Pros and Cons of Waterfall Methodology (2023)

If you’ve researched project management methodologies before, the Waterfall methodology has probably come up. On lists of popular, trusted project management methodologies, Waterfall sits comfortably among agile, Scrum, Six Sigma, and Kanban. Dr. Winston Royce first defined the methodology in 1970 in a paper about inefficiencies in large software development projects, but no one is credited for individually creating the methodology.

Almost half a century after it was identified, Waterfall still has relevance in the modern business world—but it shouldn’t be used indiscriminately. Read on to learn more about the advantages and disadvantages of the Waterfall model and to see how Lucidchart can help you and your team apply it to your next project.

Advantages of the Waterfall model

Waterfall relies on teams following a sequence of steps and never moving forward until the previous phase has been completed. This structure is suited to smaller projects with deliverables that are easy to define from the start.

Ben Aston from The Digital Project Manager explains, "Waterfall is generally regarded with some disdain as an inefficient and passé traditional project management approach. But Waterfall can be a useful and predictable approach if requirements are fixed, well documented, and clear, if the technology is understood and mature, if the project is short, and if there’s no additional value gained from 'going agile.' A Waterfall approach can actually provide more predictable end result for budget, timeline, and scope."

(Video) Advantage and disadvantage of Waterfall model | software engineering

Here’s an in-depth look at what the Waterfall methodology does best.

1. Uses clear structure

When compared with other methodologies, Waterfall focuses most on a clear, defined set of steps. Its structure is simple—each project goes through these steps:

  • Requirement gathering and documentation
  • System design
  • Implementation
  • Testing
  • Delivery/deployment
  • Maintenance

Teams must complete an entire step before moving onto the next one, so if there are roadblocks to completion, they’re brought to light right away. Half-finished projects are less likely to get pushed aside, leaving teams with a more complete, polished project in the end.

In addition to being clear, the progression of Waterfall is intuitive. Unlike Six Sigma or Scrum, Waterfall does not require certifications or specific training for project managers or employees. If you visually outline the process at the beginning using Lucidchart and explain the methodology, team members will be able to jump into the Waterfall system without a steep learning curve slowing their progress.

2. Determines the end goal early

One of the defining steps of Waterfall is committing to an end product, goal, or deliverable at the beginning, and teams should avoid deviating from that commitment. For small projects where goals are clear, this step makes your team aware of the overall goal from the beginning, with less potential for getting lost in the details as the project moves forward.

(Video) Waterfall Model for Software Development | Waterfall Model Advantages Disadvantages

Unlike Scrum, which divides projects up into individual sprints, Waterfall keeps the focus on the end goal at all times. If your team has a concrete goal with a clear end date, Waterfall will eliminate the risk of getting bogged down as you work toward that goal.

3. Transfers information well

Waterfall’s approach is highly methodical, so it should come as no surprise that the methodology emphasizes a clean transfer of information at each step. When applied in a software setting, every new step involves a new group of people, and though that might not be the case at your company, you still should aim to document information throughout a project’s lifecycle. Whether you’re passing projects off at each step or experience unexpected personnel changes, Waterfall prioritizes accessible information so new additions to the team can get up to speed quickly if needed.

You can maximize your benefits from this characteristic of Waterfall by staying organized with the right process. Use Lucidchart (it’s free to sign up!) to document processes so each team member knows what has already been done on a project when it gets to them.

The disadvantages of the Waterfall model

Waterfall is a respected methodology, but lately it’s faced criticism for being an outdated model. The methodology’s limitations become more apparent depending on the size, type, and goals of the project it’s guiding. Rather than adapting your organization to Waterfall’s guidelines later, consider these limitations to assess whether Waterfall is truly a fit for your team.

1. Makes changes difficult

Waterfall is based entirely on following a set of steps that keep teams always moving forward. The methodology, in its traditional form, leaves almost no room for unexpected changes or revisions. If your team has loyally followed the steps of Waterfall nearly to the end of the project but then faces an unplanned roadblock that necessitates a change in scope or goals, pivoting won’t be easy. You’ll have put a considerable amount of work into a project under very specific, rigid assumptions. A sudden change to the parameters of the project could render much of the work you’ve carried out up to that point useless, which can throw off the entire timeline.

(Video) Agile vs Waterfall Methodology | Difference between Agile and Waterfall | What to choose?

If your team’s projects are unpredictable or involve frequent change, consider adapting Waterfall to allow more room for reflection and revision as you go, rather than just at the end, to prevent wasted time and energy. If you decide to go this route, tailor a Lucidchart template to your team’s version of Waterfall to keep everyone aware of how to use the adjusted process.

2. Excludes the client and/or end user

As an internal process, the Waterfall methodology focuses very little on the end user or client involved with a project. Its main purpose has always been to help internal teams move more efficiently through the phases of a project, which can work well for the software world. However, if you work in an industry other than software, clients often want to be involved during a project, adding opinions and clarifying what they want as the project moves forward.

If your projects have clear, unchanging goals from the beginning and you aren’t responsible for updating end users or clients through the development process, then Waterfall will probably work well for your team. In other cases, consider an agile methodology to better anticipate change and keep stakeholders informed through the life of the project. By involving stakeholders, you lower the risk of late requests for change throwing off your project deadlines.

3. Delays testing until after completion

Saving the testing phase until the last half of a project is risky, but Waterfall insists that teams wait until step four out of six to test their products. Outside of the software industry, the testing phase could mean showing a new website design to a client, A/B testing content, or taking any number of steps to gain empirical data on the viability of the project. At this point, the project has likely taken considerable time to complete, so large revisions could cause significant delays.

The agile methodology was created in direct response to this principle of Waterfall. Critics of Waterfall felt that there was too much room for problems to remain unnoticed until the project neared completion, which left large, costly changes as the only solution. If you feel that frequent testing would serve your team better, implement testing at the end of every project stage so that you don’t move forward until you know things are working. Or consider a different project management methodology that encourages reflection and revision throughout the process.

(Video) Waterfall Model for Software Development. Advantages and Disadvantages of Waterfall Methodology

Navigating Waterfall model advantages and disadvantages

The Waterfall methodology has had critics and supporters since its inception, but it remains relevant today even as other methodologies have evolved to account for many of its flaws. If your team is small and your projects are consistent and predictable, then Waterfall could provide the ideal framework for keeping your team organized and on track.

If not, don’t be afraid to customize a project management methodology to make it right for you. With Lucidchart, you have free rein to create a structure that will work best for your team and its unique needs.

Track your Waterfall process or any methodology you choose.

Sign up for Lucidchart today!

(Video) Agile vs Waterfall Project Management: Advantages and Disadvantages of Each Methodology

FAQs

What are the advantages of the waterfall methodology? ›

Advantages of waterfall model

This model is simple and easy to understand and use. It is easy to manage due to the rigidity of the model – each phase has specific deliverables and a review process. In this model phases are processed and completed one at a time.

What are the pros and cons of the Agile and Waterfall Methodology explain in detail? ›

Agile projects are typically cheaper and can be delivered quickly. They offer greater flexibility, but also produce less predictable results due to the uncertainty and unclear nature of many of the project characteristics. Waterfall projects are typically more expensive and take longer to deliver.

What are disadvantages of waterfall model? ›

Waterfall Model - Disadvantages

No working software is produced until late during the life cycle. High amounts of risk and uncertainty. Not a good model for complex and object-oriented projects. Poor model for long and ongoing projects.

What is the main disadvantage of the waterfall project management methodology? ›

Disadvantages of waterfall

Unlike agile, this methodology does not allow for discovery, iteration, and refinement whilst developing the product. Instead, new requirements must be written.

What are the disadvantages of waterfall model how it can be overcome? ›

Disadvantages of the Waterfall model:

Not suitable for projects where requirements are at a risk of changing. Cost of fixing defects is very high when detected at a later stage. Not a good model for complex and long projects. No working software is produced until late during the lifecycle.

What are the pros and cons of using agile methodology? ›

The Pros and Cons of Agile Methodologies
  • Flexibility. ...
  • Embracing Uncertainty. ...
  • Immediate Feedback. ...
  • Less Defective Products. ...
  • CONS OF AGILE METHODOLOGY. ...
  • Lack of Documentation. ...
  • Scope Creep. ...
  • Time.
Dec 21, 2017

What are the advantages of waterfall over agile? ›

Waterfall is a better method when a project must meet strict regulations as it requires deliverables for each phase before proceeding to the next one. Alternatively, Agile is better suited for teams that plan on moving fast, experimenting with direction and don't know how the final project will look before they start.

What is the most advantage of waterfall model? ›

Perhaps one of the biggest advantages of the waterfall model is its clear and precise structure, which lays down the role that you and your associates need to perform at every phase of the project. Such clarity is crucial when planning and executing complex projects as without it, the project can easily get muddled.

What are some of the challenges with waterfall method? ›

Challenges With Waterfall Model
  • INFERIOR QUALITY. The development team is forced to cut testing short, which makes the project suffer in the long run.
  • BAD VISIBILITY. ...
  • LARGE RISK. ...
  • HOW TO HANDLE PROJECTS WHEN THEY OVERRUN THE INITIAL ESTIMATES? ...
  • Cost Overrun. ...
  • Time Overruns. ...
  • The Iron Triangle of Software Development.
Oct 27, 2017

Why waterfall method failed? ›

The Failings of Waterfall

Waterfall uses the theory that what you want at the beginning is what you get at the end so there is little, if any room, for significant changes in direction. Being an inflexible model which does not provide for feedback, it is difficult to highlight new requirements and thus change course.

What are the advantages of waterfall model over agile? ›

Waterfall suits projects with well-defined requirements where no changes are expected. Agile looks best where there is a higher chance of frequent requirement changes. Waterfall is an easy-to-manage and sequential approach. Its iterative opponent is very flexible and allows you to make changes in any phase.

What are the advantages of agile methodology? ›

Better Quality: Because it is iterative, one big benefit of agile methodology is the ability to find problems and create solutions quickly and efficiently. The flexibility of the agile method allows project teams to respond to customer reaction and constantly improve the product.

What are the waterfall methodologies? ›

The Waterfall methodology — also known as the Waterfall model — is a sequential development process that flows like a waterfall through all phases of a project (analysis, design, development, and testing, for example), with each phase completely wrapping up before the next phase begins.

What are the pros and cons of agile model? ›

What Is Agile?
ProsCons
More flexibleHard to predict
Product get to market fasterFinal product is not released first
Better communicationDocumentation gets left behind
Dec 20, 2021

When should you use waterfall methodology? ›

The Waterfall methodology prevails when the project is constrained by cost and/or time, and the requirements and scope are well understood. In these cases, the Waterfall methodology provides a set of processes that are built on the principle of approval of the previous phase.

Why waterfall is better than scrum? ›

If we must pinpoint the main difference between Scrum and Waterfall as methodologies for software development, it would be that Scrum is value-based with shorter iterations and Waterfall is schedule-based with clearly estimated costs and plan.

Is Waterfall better than Agile? ›

Agile is open to adaptation, encourages experimentation and welcomes changes of direction, even in later phases of the project. Because of this, the budget tends to be more flexible. Waterfall is a linear project progression, so it's best suited for projects with a defined end goal.

What is difference between waterfall model and Agile? ›

Agile model follows the incremental approach, where each incremental part is developed through iteration after every timebox. Waterfall model follows a sequential design process.

What is the disadvantage of Agile methodology? ›

Fragmented output. Incremental delivery may help bring products to market faster, but it's also a big disadvantage of Agile methodology. That's because when teams work on each component in different cycles, the complete output often becomes very fragmented rather than one cohesive unit.

What are the 5 stages of waterfall model? ›

Phases of waterfall project management differ from one project to another. But generally, you can group the activities of the waterfall approach into five stages: planning, design, implementation, verification, and maintenance.

What are the three types of waterfall? ›

The following is a list of waterfalls by type. Plunge: Water descends vertically, losing contact with the bedrock surface. Horsetail: Descending water maintains some contact with bedrock. Cataract: A large, powerful waterfall.

What is a real life example of a waterfall model? ›

Now that you've grasped the several sectors in which the waterfall model used to be and is still deployed, here is a real-life example of the waterfall model at work. Here, the waterfall model is used to manufacture a tractor, with each of its phases outlining the work that needs to be done.

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