What are the purpose of change management ?q1b.What are the three different types of changes?

What are the purpose of change management ?q1b.What are the three different types of changes?
What is a relationship between changes Incidents Service Request q Release
What are the Fiverisk indicators of poor change management?
What are the typical questions that a change management tool can ask the change requester?
What is the difference between Release, unit and packaging IT service provision context?
What is a drift management in the context of configuration management?q3c.What are the two types of the configuration management?