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