CHANGE is part of the CONFIGURATOR product.
Changes to the instance can be entered into the knowledgebase then collected together to create an injection package. These changes will be given a minor version number that relates them to the last major version of configurations. The changes can then be injected into the production or any other instance.
The major/minor versions allow the collection of all the changes to be brought together into one new injection package should it become necessary to reprocess from the last major version.

While the KnowledgeBase comes with a standard set of injection options and inbuilt dependencies – it is possible for the end user to create their own injection packages with the steps and dependencies required.

For further details :
Change Data Sheet