Faced with a constantly evolving environment, companies have to change and sometimes have to change in depth. These evolutions are usually intentional and monitored and they are done through business projects. Two major goals can be identified among the goals to be reached through these projects: the operational agility development and the product management expertise. This thesis work focuses on PLM (Product Lifecycle Management) project and more precisely on the implementation of the information system needed to manage products’ lifecycle : the PLM system. This information system manages all or part of information related to the definition, the manufacturing, the use and the treatment as a waste of products. First of all, a state of the art of the concepts related to product lifecycle management is done. Basing on these concepts, a method for defining the PLM system requirements is proposed. Defining this method highlights two consistency needs. The first one is related to consistency among the several PLM system models. The second one is related to consistency among the several product representations used throughout the product lifecycle. A modeling framework based on the systemic paradigm, on the ambivalence paradigm and on metamodeling concepts is then proposed. On the one hand, this modeling framework provides elements to respond to identified consistency needs. On the other hand, it supports the adoption of the synergistic reasoning that is essential for developing the operational agility sought by the enterprise. An experimentation is carried out to illustrate the concepts introduced by the modeling framework.
