EXAM - Definition of Release Unit

Which of these is the BEST description of a release unit?

A. The portion of a service or IT infrastructure that is normally released together
B. The smallest part of a service or IT infrastructure that can be independently changed
C. The portion of a service or IT infrastructure that is changed by a particular release
D. A metric for measuring the effectiveness of the Release and Deployment Management process

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Answer: A

Just as change management begins with defining which activities will require a change record, release management begins with documenting which components will be released simultaneously.

ITIL defines a release unit as the set of components that get upgraded, installed, or changed all at the same time.

As a simple example, often the next version of a business application requires new versions of middleware software products. This means that the application and the middleware form a release unit, because they are deployed at the same time.