Which of the following are required components for implementing software configuration management systems?

Audit control and signoff are foundational SCM components defined in standards like IEEE 828, ensuring that every configuration change is formally reviewed, approved, and recorded. This provides traceability and accountability, which are core mandates of any SCM system. Without audit control, the integrity and history of configuration items cannot be verified or enforced.

User training and acceptance is a change management and project management concern, not a required structural component of a software configuration management system itself.

Rollback and recovery processes are important operational and business continuity practices but are not defined as required components within the formal SCM framework or standards.

Regression testing and evaluation is part of the software quality assurance and testing discipline, not a required component of the configuration management system itself, even though it may be triggered by configuration changes.