Requirements analysis

Requirements analysis is a critical process in systems engineering and software engineering that involves determining the needs or conditions to meet for a new or altered product, taking into account the possibly conflicting requirements of the various stakeholders, such as beneficiaries or users. It is a key aspect of the requirements engineering process.

Overview

Requirements analysis encompasses those tasks that go into determining the needs or conditions to meet for a new or altered product, taking into account the possibly conflicting requirements of the various stakeholders, such as beneficiaries or users. It is a critical part of the systems development life cycle (SDLC).

Process

The process of requirements analysis involves several key steps:

• **Elicitation**: Gathering requirements from stakeholders through various techniques such as interviews, questionnaires, workshops, and observation.
• **Analysis**: Understanding and documenting the requirements, ensuring they are clear, complete, and consistent.
• **Specification**: Writing detailed descriptions of the requirements, often in the form of a requirements specification document.
• **Validation**: Ensuring the requirements meet the needs of the stakeholders and are feasible to implement.

Techniques

Several techniques are used in requirements analysis, including:

• **Use cases**: Descriptions of how users will interact with the system.
• **User stories**: Short, simple descriptions of a feature told from the perspective of the person who desires the new capability.
• **Prototyping**: Creating a preliminary version of the system to help understand the requirements.
• **Modeling**: Using diagrams and models to represent the requirements and their relationships.

Challenges

Common challenges in requirements analysis include:

• **Ambiguity**: Requirements that are not clear or are open to interpretation.
• **Incomplete requirements**: Missing information that is necessary for the development of the system.
• **Changing requirements**: Stakeholders may change their requirements during the project, leading to scope creep.
• **Conflicting requirements**: Different stakeholders may have conflicting needs or priorities.

Importance

Effective requirements analysis is crucial for the success of a project. It helps ensure that the final product meets the needs of the users and stakeholders, reduces the risk of project failure, and can help manage project scope and costs.

Related Concepts

• Requirements management
• Business analysis
• Systems analysis
• Functional requirements
• Non-functional requirements

See Also

• Software requirements specification
• Systems development life cycle
• Project management
• Stakeholder analysis