A Rolling Horizon Approach to Plan Outsourcing in Manufacturing-to-Order Environments Affected by Uncertainty

Production planning approaches considering availability of complete information, usually fail to deal with real
manufacturing environments characterized by uncertainty affecting the time to execute the manufacturing
operations, the routing of the parts, the requirement of materials and resources. This paper analyses the
problem of negotiation and planning of external resource usage in a manufacturing system affected by
uncertainty. In particular the need of resources is considered uncertain and it is modelled through a scenario
based formulation. A rolling horizon approach is proposed which applies a two-stage stochastic programming
method against the occurrence of multiple uncertain events.To demonstrate the viability of the proposed
approach, an application example based on a real manufacturing plant producing machining centres is
provided.