Constitutes the refereed proceedings of the 8th IFIP WG 6.1 International Conference on Formal Methods for Open Object-Based Distributed Systems, FMOODS 2006, held in Bologna, Italy, June 2006. This book presents 16 revised full papers together with an invited paper and abstracts of 2 invited talks.

Invited Speakers.- Security Issues in Service Composition.- Separating Distribution from Coordination and Computation as Architectural Dimensions.- The Bisimulation Proof Method: Enhancements and Open Problems.- Regular Papers.- An Approach to Quality Achievement at the Architectural Level: AQUA.- Bounded Analysis and Decomposition for Behavioural Descriptions of Components.- Modeling and Validation of a Software Architecture for the Ariane-5 Launcher.- Synchronizing Behavioural Mismatch in Software Composition.- Static Safety for an Actor Dedicated Process Calculus by Abstract Interpretation.- Temporal Superimposition of Aspects for Dynamic Software Architecture.- Modeling Long–Running Transactions with Communicating Hierarchical Timed Automata.- Transformation Laws for UML-RT.- Underspecification, Inherent Nondeterminism and Probability in Sequence Diagrams.- Generating Instance Models from Meta Models.- KM3: A DSL for Metamodel Specification.- Defining Object-Oriented Execution Semantics Using Graph Transformations.- Type-Safe Runtime Class Upgrades in Creol.- Abstract Interface Behavior of Object-Oriented Languages with Monitors.- Mobility Mechanisms in Service Oriented Computing.- Theoretical Foundations of Scope-Based Compensable Flow Language for Web Service.