In this paper we present an end-to-end methodology in developing a multiprocessor realtime analysis capability formulated on JTAG scan-based mechanisms. Specifically we discuss the issues related to extending the capability from single to multiprocessor domains. We examine the issues related to supporting real-time analysis in all of the software and hardware components. Finally, we enumerate the challenges in developing a methodology for deploying both homogeneous and heterogeneous multiprocessor combinations.