Abstract EN:

In a difficult industrial context, the manufacturing system must evolve. The manufacturing system is a complex system which is composed by a unit of interdependent resources to transform, to move, to store the products. The finality of any manufacturing system is to get better in order to survive. One of the responses to satisfy this finality is the implementation of Lean Manufacturing. In order to implement the Lean Manufacturing, a detailed manufacturing system modelling is necessary. This modelling generates a complex network of relations between the resources and activities whose it is difficult to obtain an immediate understanding. This interlacing of relations contains a whole of contradictions which it is difficult to extract. A contradiction is expressed by the opposition which the value of system parameter can take to satisfy needs for implement the Lean Manufacturing. A contradiction is expressed by this way: the transfer lot size must be raised to reduce displacement costs of products, but the transfer lot size must be weak to reduce post-operative storing costs. The difficulty to formalize these contradictions lies in the lack of information's structuring to implement Lean Manufacturing and the judicious choice of model. This model must be in coherence with Lean Manufacturing. In order to provide an explanation for better comprehension of Lean Manufacturing implementation, we propose a method for formalize the contradictions. In order to construct this method, we use certain concepts descended from Theory of General System, Axiomatic Design and OTSM-TRIZ. For greater clarity, we implement this method within the framework of description of specific contradictions network to the lead manufacturing time reduction. Finally, we propose a manner to explore this contradictions network within a workshop study.