Methods, systems, and computer-readable storage media for evaluating a validity of an extended status and action management (SAM) schema. In some implementations, actions include receiving the extended SAM schema, the extended SAM schema being stored as a computer-readable document in memory and being an extension of a core SAM schema, providing one or more goals, each goal representing an intention of the core SAM schema, the one or more goals being provided in a computer-readable document stored in memory and comprising one or more primary goals that each express an intention of a process underlying the core SAM schema, and processing the one or more goals using a computer-executable model checking tool for evaluating the validity of the extended SAM schema.