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Nowadays in industrial process area it is necessary to manage in real time all informations related to the interactions between resources, products, processes and operators along the process zone. Amongst the main constraints and objectives in industrial processes is the security issue. Especially, in industrial environment workers have to deal with unavoidable threats from products, resources and machines that are parts of work risks. Currently, many security systems depend on safety measurements that are token by interacting devices eventually exposing people lives to unpredictable situation as an example in storage and transport activities of hazardous chemical substances. Our research approach to study such fully distributed and discrete industrial environment is based on communicating object’s concept which represents a physical product equipped with perception, communication, actuation and decision making capabilities. Products and resources when upgraded so to communicate with objects then become active products that are communicating with each others. So to cope with such a complete active products’ community we propose to define a Petri nets hierarchical modelling framework in order to analyse and to solve cooperation and communication functionalities of active products. The communicating object’s approach has attracted the interest of several research projects as COBIS project (Collaborative Business Items) (CoBIs, 2008) that has developed a new approach to business processes involving physical entities such as goods and tools in enterprise. The intention is to embed business logic in the physical entities. Also, the computing department at Lancaster University (Strohbach et al., 2005) conceived cooperative products with perception, analysis and communication capacities that operate by information sharing principle. Also, (Quanz et al., 2008) is considering the problem of Object Safety: how objects endowed with processing, communicating, and sensing capabilities can determine their safety. He assigned an agent to each object capable of looking out for its own self interests, while concurrently collaborating with its neighbours and learning / reinforcing its beliefs from

Petri Nets Hierarchical Modelling Framework of Active Products' Community