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Gathering requirements properly and selecting the appropriate technique can assist in ensuring that you will not have poor requirements. One-on-One Interviews:There are some techniques for gathering requirements. These techniques are interview, prototyping, use case analysis, JAD (Joint Application Design), Requirements Gathering Techniques. Brainstorming Brainstorming is used in requirement gathering to get as many ideas as possible from group of people. Documenting the rationale for each requirement (why it is required) is a good technique to reduce the number of requirements. Taking this one step, Requirements Gathering Techniques. – Interview. – Joint Application Development. – Questionnaires. – Document Analysis. – Observation. Determining Requirements. • Participation by business users is essential. • Three techniques help users discover their needs for the new system:.