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7.4.4
.4 Relate and Verify Requirements Relationships
Requirements may be related to each other in several ways when defining the
requirements architecture. Business analysts examine and analyze the
requirements to define the relationships between them. The representation of
these relationships is provided by tracing requirements (see Trace Requirements
(p. 79)).
Business analysts examine each relationship to ensure that the relationships
satisfy the following quality criteria:
• Defined: there is a relationship and the type of the relationship is
described.
• Necessary: the relationship is necessary for understanding the
requirements holistically.
• Correct: the elements do have the relationship described.
• Unambiguous: there are no relationships that link elements in two
different and conflicting ways.
• Consistent: relationships are described in the same way, using the same set
of standard descriptions as defined in the viewpoints.
A. Defined. According to BABoK the criteria to assess requirements relationship is: Correct, Consistent, Unambiguous, Defined and Necessary. Complete is not a criterion for requirements relationships but rather to assess the quality of requirements/ designs themselves.
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