You must determine the importance of services and the resources in a service. Rely on sources of information such as business continuity plans, disaster recovery plans, and service-level agreements to obtain the services that are most important to your enterprise.
Typically, more information is available about business-critical services, making them the ideal place to start service modeling. Not all services require the same level of complexity. A critical business service may be documented in enough detail for you to create a comprehensive service model, while for a less critical service, a simpler model will suffice. CA SOI provides the flexibility for models of different detail levels, and you can make models more comprehensive as your investment level in the product grows.
Also determine the importance of the resources that make up a service, so that this importance is accurately reflected when issues occur.
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