Concept: Baseline
A baseline is a starting point for any phase of development activity. It consists of a collection of object versions that have been reviewed or tested as a set and are of known quality.
Relationships
Main Description

A baseline is a collection of object versions that can be used as the starting point of a development activity. A baseline represents a set of object versions that have been reviewed or tested (depending on type of object) as a set, and can be treated as a known, good configuration.

Typically, the baseline for one phase of development activity is created from the finished results of the previous phase.

Once a baseline has been created, its contents cannot be changed.

As development activity proceeds, it is usual to find a sequence of baselines being created which represent stages or milestones along the way.