Analyse des performances de systèmes de production sujets à des défaillances aléatoires et pouvant engendrer des produits non conformes dans un environnement incertain

Abstract : We treat in this thesis the integration problem between the various components of the industrial magnagement which are maintenance (preventive maintenance, corrective maintenance, etc...), production (quantities to produce, stockpile size, etc...) And quality (rejection rate, non-compliances, etc...). To develop such integrated models production-maintenance -Quality, two complementary approaches are adopted, the first is based on mathematical modelling and the second one uses simulation. As a first step, we propose to solve malthematically the problem od dimensioning the size to be produced for a production system that can randomly move to an out of control statue and produce non-conforming units. The system is subjected to an age preventive maintenance policy. Once the transistiion to the state out of control is detected , a restouration of the system is planned for L time units later. A mathematical model was developed to determine the quantity Q of economic production and the age T for preventive maintenance. In a second step, we have developed a joint policy of preventive maintenance and quality control for a production system that can generate conforming and nonconforming units. For the modelling of these strategies, we used two different approaches : the first uses only analytical tool and the second uses the analytical tools and simulation. Each of the strategies proposed is based on a predictive maintenance policy. According to the rate of nonconforming units generared by the machine, one decides on the modelling of these strategies, suppose thar after having undergonemaintenance actions ( preventive maintenance or revivsion), the systeme returned to its original condition (AS GOOD AS NEW), In another approach based on simulation, we propose to relax this assumption and assume that the system returned to its original state only after the overhaul actions. After having undergone the preventive maintenance actions, the systems is in a state between i its initial state just before the stop (between AS GOOD AS NEW and AS BAD AS OLD).
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Mehdi Radhoui. Analyse des performances de systèmes de production sujets à des défaillances aléatoires et pouvant engendrer des produits non conformes dans un environnement incertain. Gestion et management. Université Paul Verlaine - Metz, 2008. Français. ⟨NNT : 2008METZ038S⟩. ⟨tel-01752604⟩

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