Faunhofer Project Center for Production Management and Informatics PMI

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  • Publication
    A system for the detailed scheduling of wind farm maintenance
    ( 2011)
    Kovács, András
    ;
    Erdös, Gábor
    ;
    Viharos, Zsolt János
    ;
    Monostori, László
    As the share of wind energy increases on the global energy market, the efficient operation of wind farms gains an ever growing significance. Among operational decisions, the planning and scheduling of maintenance operations are crucial for the availability of turbines, as well as for the operational costs. The paper introduces a system that performs the detailed scheduling of maintenance operations at a set of wind farms maintained by common personnel. The scheduling problem is modeled and solved as a mixed-integer linear program. The system constitutes a module of an integrated framework for condition monitoring, diagnosis, and maintenance of wind turbines.
  • Publication
    Robust production control against propagation of disruptions
    ( 2011)
    Tolio, Tullio
    ;
    Urgo, Marcello
    ;
    Váncza, József
    In hierarchical production control systems, planning decides on capacities and operations so as to meet demand, while scheduling should guarantee the execution of production plans even in face of uncertainties. The management practice advocates rolling horizon approaches despite the danger of plan nervousness. We propose a novel framework to handle uncertainties closer to the root of their sources, when scheduling local resources. The method keeps the complexity of planning and scheduling at bay and stops the propagation of local disruptions to other resources. The paper presents the theoretical model, the solution technique, and shows their applicability on a case study taken from the tool industry.