Scrum vs. Waterfall: Which approach is right for your team?

Scrum and Waterfall are well-known project management frameworks built around very different assumptions. Understanding what makes them different will help you choose the best fit for your projects.

Scrum is a framework for complex work that uses short cycles, defined accountabilities, and regular adaptation. It assumes requirements will evolve as a project progresses. Waterfall is a sequential approach where work moves through planned phases. It assumes the project can be fully planned before work begins, with stable requirements and phases.

Neither methodology is automatically the “better” choice. Instead, you need to find the best approach for your team based on how stable your requirements are at the start, what the deliverables are, and how much change you expect. 

To explore the pros, cons, and best fit in detail, this guide covers:

• The key differences between Scrum and Waterfall project management 
• The types of projects each method is suitable for 
• How to make the call and find the best methodology for your team. 

Wrike is an all-in-one work management platform, where you can adapt your team’s workspace to run Scrum sprints, Waterfall projects, and everything in between. Try Wrike for free.

What is the difference between Scrum and Waterfall?

The fundamental differences between the Scrum and Waterfall project management methodologies are structural. 

Scrum is iterative and adaptive: teams work in short, repeatable sprints, where planning, building, testing, and reviewing happen continuously throughout the project, typically in 1–4-week cycles that end with a sprint retrospective. 

Waterfall is linear and sequential. Each phase must be completed and signed off before the next phase begins, and work only flows in one direction. The full scope of the project is defined upfront, and the team and stakeholders refer to that version of the plan throughout.

In Scrum, the project plan is a starting point that’s refined during every sprint based on:

1.  What the team learns 
2. The stakeholders’ feedback 

It’s also worth noting that the Scrum framework is a key part of Agile project management, so it requires teams to define Product Owners and Scrum Masters, set up sprint backlogs, etc., if it’s going to run effectively. 

Now, let’s look at the structural differences between Scrum and Waterfall side by side. 

As you can see, it’s not the case that one model is more sophisticated than the other; it’s that they’re optimized for different kinds of work.

Applying the Waterfall model’s linear and sequential framework to a product with evolving requirements will create problems downstream if the situation is better suited to the iterative, adaptive stance of Scrum methodology. The same logic applies in reverse.

Scrum vs. Waterfall: Pros and cons

In the next section of this post, we’ll look at the advantages and disadvantages of Scrum and Waterfall to give you a clear picture of where each approach can create value and where you might encounter friction.

Scrum: Advantages and disadvantages

Scrum's core strength is its ability to keep a team aligned as a project evolves. Teams deliver working output at the end of every sprint and review it with stakeholders. They also have daily stand-ups to review progress, request resources, and reveal problems early in the process.

Imagine a software development team. If there’s a mismatch between the feature the client requested and the feature the team can build, it gets caught after one of the first sprint cycles, and not at a key milestone six months into the project. 

That loop of early, continuous feedback (and the ideological focus on ‘working software’ over comprehensive documentation) is the reason why Scrum can be so beneficial for many teams. However, it can also be a demanding way to work, and not every organization can move at this fast, responsive pace. 

It’s worth focusing on the stakeholder availability point because it’s the most commonly underestimated risk to successful Scrum projects.

Scrum, and Agile methodologies more generally, assume someone with decision-making authority over the product — the Product Owner — is engaged throughout the project, and not just at kickoff and delivery. Organizations that can’t provide that level of ongoing involvement will find that Scrum sprints produce output that drifts from their actual business needs, which defeats the central purpose of running Scrum in the first place.

To get the full benefits of Scrum project management, project managers need some key features. 

• Built-in communication features that keep stakeholders (and any cross-functional teams) in the loop without lengthening Scrum meetings or placing additional administrative responsibilities on the team (Wrike's notifications, reporting software, and sprint dashboard features are invaluable here) 
• A detailed backlog system, where the effort for each task can be accurately estimated, backlogged tasks can be prioritized, and tasks can be effectively allocated for the next sprint. In Wrike, this information can be gathered, then routed automatically, through our dynamic request form feature.
• Robust version control features, to ensure teams are always working on the latest iteration within the project or the sprint. In Wrike, you can manage even the most complex projects through a system of shared project folders, each with role-based access permissions, within your team’s workspace.

Waterfall: Advantages and disadvantages

Because the Waterfall approach is so linear, it’s often more predictable than Scrum. In the right context, that predictability has real value. For example: 

• When a client needs a fixed price and a fixed delivery date, Waterfall gives a clear, step-by-step roadmap showing how the team will meet the requirements and what they require from the client upfront. 
• When a regulatory body requires documented sign-off at each phase, Waterfall ensures those boxes are being checked as the team moves through the project.
• When the project involves physical deliverables that can’t be iterated on, Waterfall takes the team from ideation to delivery and minimizes the chance of scope creep. 

The problems start when teams apply that same structure to work where requirements aren’t stable, because Waterfall’s phase-gate model has no good strategy for when you discover that your assumptions were wrong halfway through a project.

The testing problem deserves particular attention for software and digital product teams. 

In Waterfall, testing happens as a distinct phase after development is complete. This means that if a fundamental problem is found during testing — a misunderstood project requirement, a design flaw, an integration issue — the fix means going back through completed development work.

The later a problem surfaces, the more expensive it is to fix. Scrum distributes testing across every sprint, which surfaces those problems weeks or months earlier when they’re far cheaper to address.

To implement Waterfall project management effectively, teams need: 

• Project monitoring tools that show whether work is progressing to schedule. For example, while Scrum teams will often use Kanban boards to show how tasks are moving through their workflow, Waterfall teams might benefit more from using a Gantt chart timeline that shows how their progress is stacking up against the plan (both are available in Wrike).
• Automated workflows that support the detailed documentation required by these projects, for example, routing completed deliverables for approval before a milestone can be marked complete. In Wrike, workflow automations are as simple as when/then triggers.
• Project reporting features, including the option to customize reports to show, for example, the percentage progress, the number of tasks at each workflow stage, the budget, and the tasks at risk.

When should you use Scrum?

Scrum is the right fit when your work is complex enough that you can’t fully define what you’re building before you start work.  

In some categories of work, particularly digital products, the real requirements only become clear through the process of building and testing. If you know from experience that your initial assumptions will be wrong regardless of how carefully you completed your requirements gathering, the question becomes whether you discover it early or late. Scrum is designed to make it early, which ultimately reduces the pressure on your schedule, your budget, and your team. 

Consider using Scrum when:

• Requirements are likely to evolve. If the project involves new technology, user research that feeds back into design, or a market that’s moving fast enough to change what you’re building, Scrum's iterative model is better placed to absorb that change. 
• Frequent feedback creates better outcomes. In some scenarios, product development processes with regular stakeholder input — sprint reviews, user testing, demo sessions — tend to build products that are closer to what users actually need than products revealed for the first time at launch.
• The team can collaborate cross-functionally. Scrum's self-organizing team structure assumes developers, designers, testers, and product thinkers are working together throughout, not handing work off in sequence. Teams that are siloed by function will need to restructure before Scrum works as intended.
• Incremental delivery creates real value. If shipping a working version of part of the product early generates business value — through revenue, user feedback, or market learning — sprint-based delivery can work in your favor.
• The team needs a shared rhythm and delivery structure. Teams that have struggled with scope creep, unclear prioritization, or inconsistent output often find that Scrum's sprint cadence provides the accountability structure they were missing with more linear Waterfall models.

When should you use Waterfall?

Waterfall works best when the conditions that make an Agile approach powerful — evolving requirements, frequent feedback loops, iterative delivery — are absent. 

Some projects have stable, well-understood requirements from the start. Some deliverables can’t be broken into meaningful increments. Some regulatory environments (for example, in healthcare or manufacturing) require formal documentation and sign-off that a lightweight, sprint-based process doesn’t naturally produce. In those situations, Waterfall’s structure can be a great fit. 

Consider using Waterfall when:

• Requirements are stable and fully understood before work begins. If the client can define exactly what they want, the team can design to that definition, and neither party expects the scope to shift during delivery, Waterfall’s upfront planning model is efficient and transparent. 
• Project scope is tightly defined. Projects where the deliverables, timeline, and costs are fixed by a contract are easier to manage with Waterfall because the methodology is built around delivering a defined scope on a defined schedule.
• Heavy governance or sign-off is required. Regulated industries often require formal documentation, phase approvals, and audit trails that Waterfall produces naturally. 
• Deliverables break naturally into sequential phases. Industries like construction, infrastructure, and hardware engineering all involve physical or technical dependencies that mean work can only be completed step by step.
• A change to the plan would be expensive. When scope changes mid-project would be expensive (for example, due to contractor commitments, supply chain implications, or regulatory re-approval requirements), Waterfall’s change control mechanisms protect the project in ways Scrum's flexible backlog model doesn’t.

How do you choose between Scrum and Waterfall?

The most useful question to ask at the start of any methodology decision is, “How much do we actually know about what we’re building?” If the answer is, “Almost everything,” Waterfall gives you a reliable path to deliver it. If the answer is, “Enough to begin, but we’ll learn more as we go,” Scrum is almost certainly the better fit.

This checklist can help you work through the practical considerations to decide what approach makes the most sense:

• How likely are requirements to change during the project? 
• Do you need frequent user feedback in order to develop your deliverables?
• Is the project scope fixed by contract or industry regulations? 
• Can your team deliver incrementally?
• How costly would a late-stage change be?
• Do stakeholders want visibility during delivery or only at milestones? 

To recap, this table sums up the key features of both Scrum and Waterfall methodology, to help you identify the best fit based on your requirements. 

It’s also important to acknowledge that sometimes, teams will need to switch between their approaches depending on the project in front of them, and that many companies have departments that take very different approaches to project management. 

For organizations running both Scrum and Waterfall projects simultaneously (for example, where product development teams work in sprints alongside operations or delivery teams managing phase-gated work), Wrike supports both models in a single platform. 

In fact, Wrike will even support cross-functional work where the different teams involved in a project need to track their work through different workflows, apps, and approval cycles. 

How UNSW Sydney breaks down silos and improves cross-division communication with Wrike

UNSW Sydney has more than 59,000 students, a research community of 7,000, and 6,000 members of staff. The challenge for Dave Rorke, Project Officer, and Nancy Peaty, Production and Traffic Manager, was to lead the cross-functional team that managed all the external marketing and communications for the university. 

With Wrike, UNSW found a robust system that allowed multiple stakeholders to complete, track, and visualize work in a way that made sense for them, while still centralizing communication and reporting. 

Rorke told us, “In our case, we needed a workflow management platform, so Wrike was a brilliant option for us, particularly for the project management side of things. Wrike makes things easier and clearer, which in turn makes things consistent. It enables a lot of simplified interactions between our departments and clients, which is a game changer.” 

Within three months of implementing Wrike’s request forms, custom workflows, and real-time dashboards, the team reported a 250% increase in communication within Wrike, leading to smoother projects for the entire cross-functional team. 

How House of Design masters visibility and drives efficiency with Wrike

House of Design works in the fields of robotics and industrial automation, which means constant coordination and collaboration between teams in the machine shop, mechanical engineering, and project managers. 

When the team experienced rapid growth, they needed to update their project management system to provide more clarity to all these separate teams and set them up for sustainable growth in the future. 

With Wrike, their teams use: 

• Shared project timelines to keep themselves aligned and enhance communication with their clients
• A centralized communication hub to take conversations out of email threads
• A single source of truth that combines and integrates with the team’s disparate tools 

Reflecting on the benefits of Wrike's scalable project management systems, Chad Svedin, Project Manager, notes that Wrike saves approximately 3 hours per employee per week, which translates to over $830,000 in cost savings and increased productivity over three years.

When you know that you won’t have to choose one project management approach for the whole organization, you have the freedom to choose the method that works best for each type of work your company completes.

Use Wrike to implement the best methodology for your team  

Deciding between Waterfall and Agile frameworks like Scrum is only half the equation, because you also need a project management platform to support it. 

Wrike adapts to the way your team actually works, whether that’s sprints, phase gates, or both running simultaneously in different subteams. Wrike helps you customize your workspace to match your team’s workflows and integrate their preferred tools, so you can actually reap the benefits of the methodology you choose. 

With Wrike, you can enjoy:

• Increased oversight and transparency: Gantt charts, Kanban boards, and sprint dashboards give you a clear view of progress at every level
• Smoother communication and collaboration: Built-in notifications and a centralized communication hub keep decisions and feedback in one place
• Automated documentation and approvals: Wrike's rule-based triggers and workflows route deliverables for sign-off and keep formal records at every stage
• Detailed reporting: Customizable reports, snapshots, and dashboards keep stakeholders informed without adding to your team’s administrative load
• Improved scalability: With shared folders, cross-functional workflows, and deep integrations, Wrike grows with your team as projects become more complex

Try Wrike free, or book a demo to see how it can work for your team.