Before revision: Hazard identification, using methods such as audits, checklists, review of MSDS, historical analysis, Hazard Identification (HAZID) reviews, What-If reviews and SWIFT , Hazard and Operability (HAZOP) studies, Failure Mode and Effect Analysis (FMEA), etc.
After revision: Hazard identification, using methods such as audits, checklists, review of MSDS, historical analysis, Hazard Identification (HAZID) reviews, Structured What If Techniques (SWIFT) , Hazard and Operability (HAZOP) studies, Failure Mode and Effect Analysis (FMEA), etc.