PRINCE2 suggests that projects should be broken down into stages and these sub-processes dictate how each individual stage should be controlled. The central role of Service Level Management makes it the natural place for metrics to be established and monitored against a benchmark. ITIL Service Management Essentials Course A major upgrade or release usually supersedes all preceding minor upgrades, releases and emergency fixes.
The Enterprise Computing Institute publishes a set of coordinated books covering general issues of large scale IT management. The process is concerned with designing, implementing, measuring, and managing IT services to ensure that requirements for availability are consistently met.
IT Service Management (ITSM) is a discipline for managing information technology (IT) systems, philosophically centered on the customer's perspective of IT's contribution to the business.