Computer system and method of planning countermeasure

A method of planning a countermeasure relating to disaster recovery in a facility that is executed by a computer system,

• the computer system
• including at least one computer that includes a processor, a storage device connected to the processor, and a network interface connected to the processor, and
• managing cost information for managing a first cost that is an amount of opportunity loss during occurrence of a disaster per facility for which a countermeasure is to be executed and a second cost required for a countermeasure of self-investment, and provision resource information for managing a resource that is externally provided, and
• the method of planning the countermeasure comprising:
• a first step of allowing the at least one computer to refer to the provision resource information to determine whether the resource required for executing a countermeasure utilizing the resource in the designated facility can be ensured, and
• a second step of allowing the at least one computer to select a countermeasure to be executed on the designated facility based on the first cost, the second cost, and a result of the determination.