For the protection of key installations, fortification measures may not be sufficient by themselves. A dedicated aggressor may be able to destroy any installation given the right expertise, the right equipment and adequate time. For this reason, the protection design should not be based upon constructions only but on the totality of active and passive measures integrated into a system comprising as well resources from the social society like police, rescue forces, and military. With an abundance of resources from the social society the requirements for fortification measures may by downplayed - with limited support from the social society around the installation, the fortification measures must be more comprehensive.
Looking at the protection as a system with different passive and active components the efficient use of the combination of these puts requirements not only on the components by themselves but also on the integration and coordination of them.
To this end, the management of the protection is integral putting emphasis on how the critical information for successful protection is generated, distributed, analysed and used. Studies in Sweden have identified key issues for the handling of information for the protection management for key installations based upon the site-specific situations.
Findings for protective measures for key installations exposed to extraordinary situations are presented in the paper.