Extending the UML Profile for Schedulability Performance and Time (SPT) for component-based systems

1. Introduction Component Based Software Engineering (CBSE) is emerging as a paradigm for the development of large complex software systems. CBSE promises to yield cheaper and higher quality assembled systems by reusing configurable generic components that were developed separately [5]. UML 2.0 has extended and improved the representation of components and component-based systems. In UML 2.0, a component is an autonomous unit which has one or more well-defined interfaces (potentially exposed via ports), and its internals are hidden and inaccessible other than as provided by its interfaces [3]. The interfaces provided by a component define a formal contract of services offered to the outside world, whereas the interfaces required by a component define the services needed from elsewhere. In the performance domain there is a growing interest in modeling component based systems (e.g., [6]). This paper proposes a number of extensions to the STP Profile [2] (more exactly to its Performance Sub-Profile) in regard to component modeling.