Challenges in Requirements Management Roundtable

Requirements are stated using the verb 'shall,' and the product design must include them. The verification criteria for requirements are pass or fail.
• Goals are stated using 'should' and are desired or differentiating
characteristics for which the impact (cost versus value) is uncertain. The
verification criteria for goals are met or not met.
– All specified goals are to be included in product design. As development
progresses, a goal may be changed to a requirement, or removed. Removal of
a goal must be supported by rationale documented in the review minutes.
• Preferences indicate the desired measure of performance for use in trade
studies and design assessment. No verification activities will done to satisfy
them.