Definition of Constraint

Definition Last Updated 17-Dec-2015 12:51

A constraint is a criterion associated with a rule that places limits of one of two types on the value of an associated characteristic (observable or tag); the nature of the enclosing rule determines whether the constraint is normative or declarative as follows:

  • normative, i.e. the rule contains a word or phrase1And sometimes people say cannot when they mean may not, which is not the end of the world except when they say they cannot do something they obviously should be able to do as though being asked to break a fundamental law of physics rather than apply a quantum of common sense. If, for them, the rule is fundamental, it probably would be the end of their world if they broke it. Which is sad. such as “shall” or “must not” to say, typically, what conditions can (not), must (not) or should (not) obtain, happen or be done when the criterion is satisfied (true), or
  • declarative, or descriptive, i.e. the rule simply states the fact that a certain characteristic cannot or does not have particular values

Constraint is therefore a secondary concept; criteria are fundamental.

For examples, see the main article.

Scope

Constraint is a defined term of Enterprise Architecture. Constraint is a defined term of Business Analysis.

Notes   [ + ]

1.And sometimes people say cannot when they mean may not, which is not the end of the world except when they say they cannot do something they obviously should be able to do as though being asked to break a fundamental law of physics rather than apply a quantum of common sense. If, for them, the rule is fundamental, it probably would be the end of their world if they broke it. Which is sad.

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