RAS-slidesEN-2-REQ-Requirements.pdf

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• a requirement is anything that someone desires.

• Requirements are seen as propertie

• The requirements express the users necessities and restrictions that are placed on the system.

• two alternatives:

• user needs

• system capacities

• non-functional requirements

• functional requirements

• Requirements can be divided into:

• depends on the point of view

• Classifying

• A requirement that for a stakeholder can be perceived as being functional, can be considered as non-functional for a different one.

• deally, functional requirements must be independent of design and implementation aspects.

• ot mention any technological issue.

• A functional requirement describes a functionality to be made

• available to the users of the system.

• , if there are no contradictions among its elements;

• coherent

• complete

• satisfied