In modern IT, change management has many different guises. Project managers view change management as the process used to obtain approval for changes to the scope, timeline, or budget of a project. Infrastructure professionals consider change management to be the process for approving, testing, and installing a new piece of equipment, a cloud instance, or a new release of an application. ITIL, ISO20000, PMP, Prince2, as well as other methodologies and standards, prescribe the process to gain approval and make changes to a project or operating environment.
