Agile vs. Waterfall: Choosing the Right Methodology as a Business Analyst

As I began studying Business Analysis, I came to understand that selecting the right methodology is just as important as gathering and analyzing business requirements. Every project starts with a clear goal: to solve a business problem and provide value to stakeholders. However, another key challenge is choosing the most suitable methodology to meet that goal effectively. The discussion between Agile and Waterfall has been ongoing for a long time. Both methodologies have their own advantages and limitations, and neither is suitable for all projects. Typically, the Waterfall methodology is most effective when business goals are clear and requirements are well-defined. On the other hand, Agile is a more flexible approach that works well for projects where requirements may change or the final outcome is not fully known. To better understand this, let's first look at the Waterfall methodology. In the Waterfall approach, the project follows a step-by-step process. It starts with planning, followed by requirement analysis, design, development, testing, and finally deployment. Each phase must be completed before moving on to the next. Since each stage depends on the previous one, making changes to the original requirements is usually not encouraged, as it may impact the project timeline, cost, and workflow. To clarify this concept, let's look at an example. Imagine a company wants to develop an online food delivery app. The Business Analyst collects all the business requirements from stakeholders before development starts. Once the requirements are finalized, the development team begins building the app according to the approved plan. Now, suppose during the fourth month of development, the client asks for an additional feature, such as live order tracking. Since the project has already gone through several development stages, adding this new requirement would increase both the cost and the timeline. It might also require changes to the design, development, and testing that have already been completed. In this case, the Business Analyst would need to go through a formal change request process and work with the stakeholders to evaluate the impact before including the new feature. Let's now look at the same example using the Agile methodology. Unlike Waterfall, Agile breaks the project into smaller parts called sprints. Instead of delivering the entire application at the end, the development team delivers working features in each sprint. For instance, during the first sprint, the team might focus on the user login functionality. In the second sprint, they might deliver features for browsing and ordering food. After reviewing these working features, the client might request the addition of live order tracking. Since Agile is designed to handle changing business needs, this new functionality can be added to one of the upcoming sprints without greatly affecting the project as a whole. This allows stakeholders to provide ongoing feedback and ensures the final product better meets business expectations. This comparison clearly shows that the Waterfall methodology is most appropriate when business requirements are stable and well-defined from the start. In contrast, Agile is more suitable for projects where requirements are expected to change during the course of the project. As a Business Analyst, understanding the nature of the project is essential before choosing a methodology. Selecting the right approach is crucial for delivering value to stakeholders and achieving the desired business outcomes. At the same time, it is important to ensure that the chosen methodology aligns with the project's goals, timeline, budget, and stakeholder expectations. Based on what I have learned, I believe a Business Analyst should be comfortable using both Agile and Waterfall methodologies. Agile works well when business needs are constantly changing and revisions are expected throughout the project. Waterfall is more appropriate when requirements are clear, stable, and unlikely to change. Therefore, no single methodology should be applied in the same way to every project. The role of a Business Analyst is to understand the project’s objectives, analyze the business requirements, and select the methodology that best supports successful project delivery. Making the right choice ultimately helps the team achieve its goals while delivering maximum value to the stakeholders.