The correct answers are B, C, and D because these are core required components of a Management of Change (MOC) system as defined by CCPS.
Option B is correct because MOC requires a systematic evaluation of the impact of any change on process safety . This includes identifying new hazards, assessing risks, and determining whether existing safeguards remain adequate. This step is essential to prevent unintended consequences, such as introducing new failure modes or hazardous conditions.
Option C is also correct because CCPS requires that MOC be governed by a formal written procedure . This ensures consistency, accountability, and traceability in how changes are proposed, reviewed, approved, and implemented across the organization.
Option D is correct because approval requirements are a key part of MOC. Changes must be reviewed and authorized by qualified personnel (e.g., engineering, safety, operations) before implementation to ensure all risks are properly addressed.
Option A is not a primary element of MOC. While safe work practices may be affected by a change and could be reviewed as part of the process, they are not a fundamental requirement of the MOC workflow itself .
Overall, CCPS emphasizes that effective MOC systems must include hazard review, documentation, and formal authorization to maintain process safety integrity.
