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Open physical complex systems involve multiple interconnected software and hardwar entities which enable logical/physical interactions between them and their shared environment. They rise to many hierarchical level which exhibit common behaviours. These entities have their own goals but participate to the accomplishment of the global system. There are different classes of open physical complex systems like control systems processing systems, communication systems and interactive systems. Because these systems take over new wireless technologies, they are more and more distributed, decentralized and often not completely described. Through the use of multiagent system to model Open physical complex systems (OCPS) two types of requirements emerge: requirements in methods and in specific system architectures. Concerning the specific methods, our contribution is the DIAMOND method (Decentralized Iterative Approach for Multiagent Open Networks Design (Jamont & Occello, 2007)). Concerning the requirements in architecture, our contribution is the MWAC model (Multi-Wireless-Agent Communication) based on our previous work on wireless sensor networks (Jamont & Occello , 2006). In this chapter, we focus on specificities of the methodological requirements. We try to answer to some questions asked by this type of applications in lifecycle terms, about the design step and the formalism. A method consists in concepts, in an approach and in tools. So, in a first section, we focus on the main concept of our works: the multiagent paradigm. In a second part, we present the approach of the DIAMOND method. The third part describes the different steps and activities of our method. Before concluding, we propose a discussion of the method in comparison to other multiagent methods.

A Multiagent Method to Design Open Embedded Complex Systems