If you have any experience in project management, I’m sure that you’re aware of many kinds of changes which may happen to projects.
Some changes may affect the project baselines; e.g. scope, time and cost. Other changes might be related to the product itself, such as its specifications.
Configuration management system and change management system are used to manage these types of changes.
Although ‘change management’ is a very common term, configuration management is not, unless you are an IT project manager where the term ‘configuration management’ is used more often.