Product Lifecycle Management (PLM) systems are sufficiently generic to propose models adapted to companies’ specific needs without additional development. However, the implementation of such systems and their multiple reconfigurations may introduce coherence problems. To ensure structural and functional coherence while creating and evolv- ing PLM models, a methodological approach is described in this paper. The proposed approach is based on Model Driven Architecture (MDA) principles in order to allow : [1] models’ creation while respecting syntac- tic and semantic constraints, [2] models’ evolution while respecting de- pendencies between the various PLM syste’ components. This approach is being prototyping based on Eclipse framework.