Skip to content


What Requirements Engineer Do?

A requirements engineer plays a crucial role in the development of software and systems. Requirements engineer is responsible for defining, documenting, and maintaining the requirements necessary to deliver a product that meets the expectations and needs of stakeholders. The role of a requirements engineer is both critical and multifaceted, encompassing various tasks and responsibilities across the development lifecycle.

What is the Requirement engineering

Requirement engineering is the process of gathering, analyzing, specifying, and managing the requirements for a system, product, or service. It is an important phase in the software development life cycle because it helps to ensure that the final product meets the needs of the stakeholders and users. Properly defined and managed requirements also serve as a foundation for the design and development of the system, and can help to reduce costs and improve the quality of the final product. Additionally, it can also aid in the testing and maintenance of the system, as well as in the communication between the development team and stakeholders. Overall, requirement engineering is an important step in the software development process that can help to ensure that the final product is of high quality, meets the needs of stakeholders, and is delivered on time and within budget.

Why Requirement Gathering Is Important For Building Software

Requirement gathering is a crucial part of software development process because it sets the foundation for the entire project. It is the process of identifying and documenting the needs and constraints of the stakeholders, users, and customers for the system, product, or service being developed. It is the first step in the software development process

  • Defines Project Scope and Objectives: Effective requirement gathering helps define the scope of the software project, outlining what needs to be done and what the final product should achieve. This clarity prevents scope creep, where features, functions, or requirements are added to the project after the initial phases of development, potentially causing delays and increasing costs.

  • Ensures Stakeholder Alignment: Requirement gathering involves discussions with all stakeholders, including clients, end users, project managers, and development teams. This process ensures that everyone’s expectations are aligned from the outset, reducing the risk of misunderstandings and ensuring that the final product meets the needs of its users.

  • Facilitates Estimation and Planning: With a clear understanding of requirements, project managers can create more accurate estimates and realistic timelines. This helps in resource allocation, scheduling, and budgeting, which are critical for project management and execution.

  • Improves Quality and User Satisfaction: By understanding the user needs and the business context early in the project, developers can design software that is more user friendly and tailored to the specific needs of its intended audience. This increases user satisfaction and adoption rates.

  • Reduces Rework and Cost Overruns: Unclear or misunderstood requirements can lead to software that does not meet the intended needs, requiring costly and time consuming rework. Clear and well documented requirements help minimize changes and revisions during later stages of the project.

  • Helps in Risk Management: During requirement gathering, potential risks and obstacles can be identified early. This proactive approach allows teams to devise strategies to mitigate risks before they become problematic, ensuring smoother project execution.

  • Enables Effective Communication: A well documented requirement set serves as a key communication tool within the team and with external stakeholders. It ensures that everyone involved has a clear understanding of the project goals and requirements, facilitating more effective and efficient collaboration.

What Requirements Engineer Do

Requirements Engineer plays a pivotal role in the software development lifecycle, focusing on the elicitation, analysis, specification, and validation of the requirements for a proposed system.

  • Elicitation: The Requirements Engineer starts by gathering requirements from various stakeholders, which include end users, business managers, and technical teams. They employ a variety of techniques to collect this information, such as interviews, surveys, document analysis, observation, and workshops. The goal is to capture a comprehensive set of needs and expectations that the software must fulfill.

  • Analysis: Once requirements are gathered, they need to be analyzed to identify conflicts, redundancies, and gaps. Requirements Engineers evaluate the feasibility of each requirement in the context of the project’s technical framework and business goals. They also prioritize requirements based on factors like stakeholder importance, urgency, and the impact on the business.

  • Specification: After analysis, the next step is to document the requirements in a clear, concise, and unambiguous manner. This often involves creating detailed use cases, user stories, or requirement specifications that serve as a guideline for the development team. The documentation should be understandable by both technical and non technical stakeholders and serve as a reference throughout the development process.

  • Validation: Requirements Engineers must ensure that the requirements specifications accurately represent what the stakeholders want and what was agreed upon. This involves reviewing the documents with stakeholders, revising any discrepancies, and obtaining formal approval.

  • Management: Throughout the project, the Requirements Engineer manages changes to the requirements as new information surfaces or the project’s scope evolves. They use requirements management tools to track requirements and ensure that changes are reflected in project plans and communicated to all relevant parties.

  • Communication: A key part of a Requirements Engineer’s role is to act as a bridge between stakeholders and the development team. They must communicate effectively, ensuring that all parties have a common understanding of the project requirements and that the development team fully understands the specifications.

  • Verification: Toward the later stages of the project, the Requirements Engineer verifies that the final product meets all the specified requirements. This includes working closely with Quality Assurance teams to develop test cases and participating in the testing process to check for compliance with the requirements.

Enozom is a software development company that plays a vital role in the digital ecosystem, specializing in creating web and mobile applications that cater to various business needs. Within Enozom, the role of Requirements Engineer at Enozom is critical for aligning software projects with specific client needs and industry standards. A Requirements Engineer at Enozom would engage in continuous dialogue with clients to elicit and refine requirements, ensuring the final product is perfectly aligned with the client’s business goals and user expectations. By managing these requirements throughout the development process, they facilitate agile, iterative development cycles, keeping projects adaptable and responsive to feedback. Their work is pivotal in maintaining high client satisfaction and supporting Enozom’s reputation for delivering robust, effective software solutions that drive business success.

Requirements Engineer In Waterfall Model

The Waterfall model is one of the oldest and most structured methodologies in software development, characterized by a linear and sequential approach where each phase of the lifecycle must be completed fully before the next begins. the role of a Requirements Engineer is crucial, especially during the early stages of the project.

Requirements Gathering

In the Waterfall model, the project starts with the requirements gathering phase. The Requirements Engineer is primarily responsible for collecting all necessary information from stakeholders. This includes understanding user needs, system requirements, business goals, and any constraints the project might face. Techniques such as interviews, questionnaires, and stakeholder meetings are commonly used to ensure all necessary data is gathered.

Requirements Documentation

Once all requirements are collected, they need to be documented meticulously. In the Waterfall model, this documentation must be comprehensive and finalized before moving to the next phase. The Requirements Engineer writes detailed specifications that describe the system’s functionality, interfaces, performance, and other characteristics in a manner that is clear and unambiguous. This document serves as the foundation for all subsequent phases of the project.

Requirements Validation

After the requirements are documented, the Requirements Engineer conducts validation activities to ensure the documented requirements accurately reflect stakeholder needs and are technically and financially feasible. This step may involve reviews with stakeholders, walkthroughs, and requirements sign off. This validation ensures that the project proceeds based on accurate and approved requirements.

Support During Design and Implementation

Though the Requirements Engineer’s role is less hands on in these phases, they must remain available to clarify requirements and resolve any ambiguities that designers or developers might encounter. In the Waterfall model, changes are discouraged once a phase is completed, so the Requirements Engineer must ensure that the requirements are clear and comprehensive from the outset.

Verification and Validation

Towards the final phases of the Waterfall model, the Requirements Engineer works with the Quality Assurance team to verify that the software meets all the outlined requirements. They help design test cases and validation criteria to ensure that every requirement is tested and that the final product aligns with the user and business needs defined in the requirements document.

Maintenance and Managing Changes

If changes are necessary after the project has progressed past the requirements phase, the Requirements Engineer will need to manage these changes meticulously to avoid project scope creep. They assess the impact of any change on the project and document it accordingly. Even in the post deployment phase, the Requirements Engineer might be involved in analyzing the impact of any new requirements on the existing system.

In the Waterfall model, the Requirements Engineer plays a pivotal role in ensuring that the project is built on a solid foundation of well defined and agreed upon requirements. Their work is crucial for aligning the project outcomes with business objectives and user expectations, making them a key player in the project’s success.

Requirements Engineer In Agile Model

In contrast to the Waterfall model, the Agile model adopts a highly iterative and incremental approach to software development. In Agile environments, the role of a Requirements Engineer, often blended with roles like the Product Owner or Business Analyst, is dynamic and involves continuous engagement with both the development team and stakeholders.

Continuous Requirements Elicitation

Unlike the Waterfall model, where requirements gathering is a discrete initial phase, in Agile, requirement elicitation is a continuous activity. Requirements Engineers (or equivalent roles) gather requirements iteratively throughout the project. Each iteration or sprint starts with a planning session where new requirements are discussed, prioritized, and detailed. This continuous reevaluation helps to adapt to changes quickly and effectively.

User Stories and Backlog Management

Requirements in Agile are often captured as user stories, which are short, simple descriptions of a feature told from the perspective of the user or customer. The Requirements Engineer is responsible for creating and maintaining these user stories and managing the product backlog. This includes prioritizing user stories in the backlog to ensure that the team is always working on the most valuable features first.

Refinement and Prioritization

Regular backlog refinement sessions are conducted to review, prioritize, and elaborate on the user stories. The Requirements Engineer helps clarify the details of user stories, breaks down larger stories into manageable tasks, and re-prioritizes the backlog based on feedback, new information, or shifting business objectives.

Sprint Planning

During sprint planning meetings, the Requirements Engineer collaborates with the development team to select user stories for the upcoming sprint based on their priority and the team’s capacity. They help the team understand the requirements and the acceptance criteria for each story, ensuring that everyone has a clear and common understanding of what needs to be done.

Iterative Feedback and Adaptation

Agile projects thrive on feedback from stakeholders and end users. The Requirements Engineer plays a key role in facilitating this feedback loop. They organize and participate in review sessions, demos, and retrospectives to gather feedback on the product increments developed during each sprint. This feedback is crucial for adapting future development to better meet user needs.

Collaboration and Communication

Effective communication is vital in Agile projects. The Requirements Engineer ensures that there is a clear flow of communication between stakeholders and the development team. They act as a bridge to convey expectations, changes, and clarifications, fostering a collaborative environment that supports the Agile principle of customer collaboration over contract negotiation.

Verification and Validation

While the Quality Assurance team usually handles specific testing tasks, the Requirements Engineer ensures that the developed features meet the stipulated acceptance criteria. They verify that the product evolves as per the user stories agreed upon and validate that the software meets the business needs and adds value to the user.

In the Agile model, a Requirements Engineer or an equivalent role such as a Product Owner, continuously interacts with both the project team and stakeholders to ensure that the evolving product aligns with business goals and user expectations. Their role adapts as the project progresses, focusing on flexibility, continuous improvement, and delivering maximum value to the customer.


Requirements Engineer is instrumental in ensuring the success of software development projects by acting as the critical link between the stakeholders and the development team. Their primary responsibilities encompass eliciting, analyzing, documenting, and managing requirements to ensure that the final software product meets the intended needs and expectations. Through effective communication, diligent documentation, and proactive management of changes, Requirements Engineers help guide projects smoothly from conception to completion. Their role adapts to different project methodologies, whether it be the structured phases of the Waterfall model or the iterative cycles of Agile development, demonstrating their versatility and essential contribution to the field of software engineering. Their expertise not only minimizes risks and errors but also enhances the overall quality and relevance of the software solutions provided to end users.