This volume consists of the proceedings of the Sixth International Conference on Formal Modelling and Analysis of Timed Systems (FORMATS 2008). The maingoalof thisseriesofconferencesis to bring togetherdiversecommunitiesof researchers that deal with the timing aspects of computing systems. Both f- damental and practical aspects of timed systems are addressed. Further, three invited talks that survey various aspects of this broad research domain were presented at the conference: "Composing Web Services in an Open World: QoS Issues" (Albert Benveniste); "Recent Results in Metric Temporal Logic" (Jo] el Ouaknine); "Comparing the Expressiveness of Timed Automata and Timed - tensions of Petri Nets" (Jiri Srba). FORMATS2008wasco-locatedwithQEST2008(FifthInternationalConf- ence on the Quantitative Evaluation of SysTems) and took place in Saint-Malo, France, during September 14-17, 2008. Detailed information about FORMATS 2008 can be found athttp: //formats08.inria.fr/, while, the generic link for the QEST conference series ishttp: //www.qest.org. This was a great opp- tunity for researchers of both communities to share their scienti?c interests in timed systems."

Daily life relies more and more on safety critical systems, e.g. in areas such as power plant control, traffic management, flight control, and many more. MOVEP is a school devoted to the broad subject of modeling and verifying software and hardware systems.This volume contains tutorials and annotated bibliographies covering the main subjects addressed at MOVEP 2000. The four tutorials deal with Model Checking, Theorem Proving, Composition and Abstraction Techniques, and Timed Systems. Three research papers give detailed views of High-Level Message Sequence Charts, Industrial Applications of Model Checking, and the use of Formal Methods in Security. Finally, four annotated bibliographies give an overview of Infinite State Space Systems, Testing Transition Systems, Fault-Model-Driven Test Derivation, and Mobile Processes.