Capacity Management focuses on the planning and improvement of service capacity.  This involves modeling, estimating, tuning, and application sizing.  A major aspect of this process is creating the Capacity Plan.  The creation of a service level agreement (SLA) typically involves specifying the capacity of that service.  Other aspects of capacity management includes  

• demand management
• resource management

All data and information generated for this process are kept in the Capacity Management Information System (CMIS). 

Capacity is closely related to availability.  That is, if a service or resource does not have sufficient capacity, it may be considered to be unavailable by users.  In addition, of a specific resource within a service is unavailable, the capacity of that service may be reduced. 

Capacity improvements may be proposed via change requests, which are sent to the Change Management process.