Management of service level agreements for composite Web services

摘要

Method and apparatus are disclosed for managing at least one service level agreement (SLA) associated with at least one composite Web service. For each completed process instance, the status data logged in executing the process instance is analyzed to determine whether the process instance satisfied the SLA. The violation/satisfaction data and the logged status data are then used to construct an explanatory decision tree. Each node in the explanatory decision tree represents at least one attribute of the process instances, each branch from a node represents a subset of attribute values of the attribute of the node, and each leaf node indicates a probability value that process instances having attribute values consistent with the attribute values in nodes on a path to the leaf node fail to satisfy the SLA. Data that represents the explanatory decision tree may then be output to explain past violations of SLAs. Other embodiments generate a predictive decision tree that may be used in predicting whether active process instances will violate a SLAs.