what are SCM functions?

these are as folllows

• Identification of software items and products
• Definition of Baselines
• Access controls
• Progressing defect reports
• Progressing change requests
• Recording item status
• Controlling releases (versions and variants)
• Reporting

what are the problems of change?

First two things come to mind

• Which component?
• Which version?

there may be

• Double (or multiple) maintenance
• Updates to shared data
• Simultaneous update

why products change or whats the reasons products change?

Reasons may be

• Requirements change during and after development
• Errors are found and need correction
• Variants are needed

what are the causes of changes?

There are two types of changes

Evolutionary changes

• The system evolves as it passes through various stages in the development cycle

Revolutionary changes

• Such change is caused by the system being unable to satisfy the user’s requirements or the customers or producers expectations