Which of the following is not a requirement elicitation technique?

Answer: Data Flow diagram is not a requirement elicitation technique.

Key idea: elicitation techniques are methods used to gather information from stakeholders about what the system should do. Modeling diagrams are used to represent and analyze requirements after or during elicitation.

• Interviews: Direct discussions with stakeholders to uncover needs, assumptions, and constraints.

• The use case approach: Elicits functional requirements by describing user–system interactions and scenarios.

• Facilitated Application Specification Technique (FAST): A workshop-style elicitation method where stakeholders jointly define requirements.

• Data Flow diagram: A modeling and analysis tool used to show how data moves through a system; it helps document and analyze processes but is not primarily a technique for eliciting requirements.

Tip: When preparing to gather requirements, choose elicitation techniques (interviews, use cases, workshops like FAST) to collect information. Use diagrams such as data flow diagrams afterward to model, validate, and communicate the collected requirements.