Pt. 1. General Introduction. Ch. 1. Elements of a Real-Time Methodology -- Pt. 2. Introduction to the ROOM Modeling Language. Ch. 2. Characteristics of Real-Time Development. Ch. 3. Key Elements of the ROOM Modeling Language. Ch. 4. An Overview of the ROOM Modeling Language -- Pt. 3. The Definition of the ROOM Modeling Language. Ch. 5. The Conceptual Framework of ROOM. Ch. 6. High-Level Structure Modeling. Ch. 7. Layering. Ch. 8. High-Level Behavior Modeling. Ch. 9. Inheritance. Ch. 10. The Detail Level. Ch. 11. Implementing ROOM Models -- Pt. 4. Process Issues. Ch. 12. Model Development Heuristics. Ch. 13. Architectural Heuristics. Ch. 14. Work Organization -- Appendix A The ObjecTime Toolset -- Appendix B An Annotated Implementation Example -- Appendix C Rationale for ROOMcharts -- Appendix D ROOM Graphical Notation Summary -- Appendix E ROOM Linear Form Representation - Concrete Syntax