Toward an implementation of recovery procedures for flexible manufacturingsystems supervision

This paper first specifies Recovery and gives some trends about Recovery st rategies. Then, it focuses on Reconfiguration. Several reactivity levels ar e defined according to the failure impact, flexibilities reserved during th e exploitation phase, and flexibilities corresponding to the whole potentia lities of the architecture. These enable to know if the FMS can react with its current configuration, or if its configuration has to be changed to go on with the production, or if the production has to be changed to maintain FMS availability. The Recovery procedures are implemented through a model n amed Operational Accessibility Graph, which has been emphasized by the defi nition of new attributes and methods. Some algorithms, based on the graph t heory, are presented. (C) 2000 Elsevier Science B.V. All rights reserved.