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Multiprocessor system on chip designs use complex on-chip networks to integrate different programmable processor cores, specialized memories, and other components on a single chip. MpSoC have been become the architecture of choice in many industries. Their heterogeneity inevitably increases with intellectual-property integration and component specialization. System integration is becoming a major challenge in their design. Simulation is state of the art in MpSoC performance verification, but it has conceptual disadvantages that become disabling as complexity increases. Formal approaches offer a systematic alternative. The article presents a technology that uses event model interfaces and a novel event flow mechanism that extends formal analysis approaches from real-time system design into the multiprocessor system on chip domain.