The UML (Unified Modeling Language) is a third-generation object-oriented modeling language recently accepted as a standard by the OMG (Object Management Group). The OMG is an association of over 800 leading technology companies that have banded together to promote standards in the object community. The UML standard draws on the last decade of intensive experience in object modeling, discarding features that didn’t work and enhancing support for those that have proven their value. The UML has successfully been applied to the development of real-time and embedded systems in many different vertical markets from medical systems to avionics to military systems to office automation. The UML is clearly and demonstrably completely adequate to model and develop real-time systems without requiring extensions or modifications. By “Real-Time UML”, I mean the application of the UML standard to the development of real-time and embedded systems, and focusing attention on those aspects of UML especially relevant to the areas of special concern for such systems.


Embed System Class Diagram Sequence Diagram Active Object Object Management Group 
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  1. 1.
    Screenshot of Rhapsody, an executable UML modeling and development tool. For information see
  2. 2.
    UMLTM profile for schedulability, performance, and time specification. OMG document ptc/02-03-02, Object Management Group 2002.Google Scholar
  3. 3.
    Bruce Powel Douglass. Doing hard time: Developing real-time systems with UML. Addison Wesley, 1999.Google Scholar
  4. 4.
    Bruce Powel Douglass. Real-Time UML 2nd Edition: Developing Efficient Objects for Embedded Systems. Addison Wesley, 1999.Google Scholar
  5. 5.
    Bruce Powel Douglass. Real-Time Design Patterns: Robust scalable architecture for real-time systems. Addison Wesley, 2003. in press.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Bruce Powel Douglass
    • 1
  1. 1.I-LogixUSA

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