Release and deployment management is used by the software migration team for platform-independent and automated distribution of software and hardware, including license controls across the entire IT infrastructure. Proper software and hardware control ensures the availability of licensed, tested, and version-certified software and hardware, which functions as intended when introduced into existing infrastructure. Quality control during the development and implementation of new hardware and software is also the responsibility of Release Management. This guarantees that all software meets the demands of the business processes.
The goals of release management include:
- Planning the rollout of software
- Designing and implementing procedures for the distribution and installation of changes to IT systems
- Effectively communicating and managing expectations of the customer during the planning and rollout of new releases
- Controlling the distribution and installation of changes to IT systems
Release management focuses on the protection of the live environment and its services through the use of formal procedures and checks.
A Release consists of the new or changed software and/or hardware required to implement approved changes. Release categories include:
- Major software releases and major hardware upgrades, normally containing large amounts of new functionality, some of which may make intervening fixes to problems redundant. A major upgrade or release usually supersedes all preceding minor upgrades, releases and emergency fixes.
- Minor software releases and hardware upgrades, normally containing small enhancements and fixes, some of which may have already been issued as emergency fixes. A minor upgrade or release usually supersedes all preceding emergency fixes.
- Emergency software and hardware fixes, normally containing the corrections to a small number of known problems.
Releases can be divided based on the release unit into:
- Delta release: a release of only that part of the software which has been changed. For example, security patches.
- Full release: the entire software program is deployed—for example, a new version of an existing application.
- Packaged release: a combination of many changes—for example, an operating system image which also contains specific applications.
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