During a Permit to Work (PTW) system audit, various important documents are typically reviewed to assess system effectiveness and compliance. These documents include permit records, PTW procedures, training records, authorization documentation, risk assessments, communication records, incident reports, checklists, work logs, equipment inspection records, closure records, previous audit reports, regulatory compliance documentation, management review records, and training materials. It’s important to check with applicable compliance regulation requirements for a complete list of what your organization needs.