Capacity Management is one of five components in the ITIL Service Delivery area. The work is proactive rather than reactive in nature and is responsible for ensuring that business needs and service definitions are fulfilled using a minimum of computing resources.
Capacity Management activities include:
Monitoring, analyzing, tuning, and implementing necessary changes in resource utilization
Managing demand for computing resources, which requires an understanding of business priorities
Modeling to simulate infrastructure performance and understand future resource needs
Application sizing to ensure required service levels can be met
Storing capacity management data
Producing a capacity plan that documents current utilization and forecasted requirements, as well as support costs for new applications or releases
Building the annual infrastructure growth plan with input from other teams
