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In this thesis the inoperability I/O model has been used in a case study to evaluate if it is applicable to Swedish conditions and if it is a suitable approach of describing interdependencies. The inoperability I/O model can, given a perturbation from one or more sectors, estimate the ripple effects measured in terms of industry inoperability and economic losses. The model approximates physical interdependencies with economic dependencies. The inoperability I/O model could be a cost-effective efficient alternative for comprehensively accounting for physical linkage between national sectors, considering the lack of alternatives.