You may recall that software configuration management (SCM) is one of the five KPA required for an organization to be at CMM level 2. That means, according to SEI, effective project management is not possible without having a proper SCM function in place.
The basic idea behind SCM is to manage and control change. As mentioned by Bersoff, no matter where you are in the system life cycle, the system will change, and the desire to change it will persist throughout the life cycle. It is therefore essential that we manage and control it in a fashion that this continuous change does not convert into chaos.
Software Safety is a software SQA activity that focuses on identification of potential hazards that may affect software negatively and cause an entire system to fail. Modeling and analysis process is conducted as part of software safety and hazards are identified and categorized by criticality and risk.