Change management should take into account various categories of
systems that are changed, types of changes that are made, and the specific
procedures for each combination. For example, the machine categories
may include desktops, departmental servers, corporate infrastructure systems,
business-critical systems, Internet presence, and production e-commerce systems.
Categories of changes may include account and access management,
directory updating, new service or software package installation, upgrade of
an existing service or software package, hardware changes, security policy
changes, or a configuration change.