Quality of service parameters

There are many Quality of Service (QoS) parameters that are relevant to a schedulability analysis.

For example, the duration of operations is a Quality of Service (QoS) parameter. In the level of classes, the QoS parameters include these attributes among others:

Values for these parameters are needed to perform schedulability analysis in both the empirical and theoretical ways.

One important goal of future real-time extensions to the UML is to identify an appropriate set of QoS timeliness properties. The natural mechanism to do that would be UML-tagged values.

IBM® Rational® Rhapsody® has an extensible property mechanism that closely corresponds to the notion of UML-tagged values.


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