Applying Concept Reuse for Adaptive Service Composition does not meet the specification of expected system function or the specification does not adequately capture the functional requirements of the system. The failure domain of distributed services can be classified as follows: · Content: Content failure happens when the information delivered at the service in- terface is different from what is expected, as defined by the specification (Avizienis, Laprie, Randell, & Landwehr, 2004) Timing: When the delivery of informa- tion at the service interface does not meet the required timing constraints, a timing failure is said to have occurred (Avizienis, Laprie, Randell, & Landwehr, 2004) Availability: A system can become un- available through the cessation of service or the system is just not reachable. Cessation of service can occur during a halt failure. · · environmental conditions, unanticipated inputs, or system misuse. The goal of fault-tolerance is to improve de- pendability in a system by enabling it to perform its intended functions in the presence of a given num- ber of faults (Nelson, 1990). There exist several definitions of dependability (Avizienis, Laprie, Randell, & Landwehr, 2004). These definitions often depend on the attributes (e.g., availability, reliability and safety) of the system that are being defined as a criterion to decide whether or not a system is dependable. The attribute defined may depend on the intended use of the system. In general, dependability is based on the notion of reliance in the context of interacting compo- nents. It associates to the relation depends upon, where a component A depends upon a component B if the correctness of B's service delivery is nec- essary for the correctness of A's service delivery (Avizienis, Laprie, Randell, & Landwehr, 2004).