This document is a General Operation Audit Report detailing the findings from an audit conducted on August 17, 2023, for the Maintenance Department in Chicago, IL. The report outlines the audit's objectives, scope, and criteria, which are aligned with three international management system standards: ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018. The audit assessed compliance with safety and labor codes, internal rules, and financial standards. It includes a checklist for auditors to evaluate compliance, noting actions required for non-compliance and opportunities for improvement. The report also specifies the audit team members, the number of personnel under audit, and the logistics of the audit process. Findings indicate a high compliance score of 98.55%, with specific areas identified for improvement, particularly regarding the documentation of the Integrated Management System (IMS) scope. The report concludes with a summary of compliance across various clauses of the audit criteria.