1. A method of instructing at least one operator in a best practices implementation of a process for managing resource capacity in an information technology (IT) environment, the method comprising providing instructions to the at least one operator to perform acts of: (A) performing resource capacity management in a hierarchical manner that comprises at least the following tiers: a business capacity management tier that ensures that future business requirements for the IT environment are considered, planned and implemented in time to be functioning when business needs make them desirable; a service capacity management tier that focuses on the management of the performance of operational services provided by the IT environment and used by users of the IT environment; and a resource capacity management tier that focuses on the management of individual components of the IT environment; (B) creating at least one model of at least some aspects of the IT environment, the at least one model comprising at least one model of the IT environment at the business capacity management tier, at least one model of the IT environment at the service capacity management tier, and at least one model of the IT environment at the resource capacity management tier; and (C) considering information derived from the at least one model of the IT environment at the service capacity management tier and/or information derived from the at least one model of the IT environment at the resource capacity management tier in determining modifications to the IT environment at the business capacity management tier.