Five key stages of IT Process

Service Strategy: This stage focuses on the ITIL service lifecycle and describes how to design, develop, and implement IT Service Management.

Service Design: This stage describes how to design services and processes.

Service Transition: This stage explains how to manage the transition of a new or changed service with a focus on ensuring that all service management processes balance.

Service Operation: This stage guides you in ways to ensure that services are delivered and are running smoothly and reliably.

Continual Service Improvement: This stage covers how to re-align IT services as business needs change. CSI consists of seven steps that cover what can and should be measured; gathering, processing and analyzing data; and presenting and using information.

Problem management: ITIL makes a distinction between “incident management” and “problem management.” Incident management is the individual problem that your users deal with, such as an offline printer, for example. Problem management examines root cause of a problem, what can be done, and which resources can be engaged to prevent it from happening again.