Early auditing began as an effort to avoid fines or other action from governmental agencies, without being based on accepted standards. However, for EHS auditing to be accepted as credible in the business world, established standards were necessary. As companies expanded globally, the need for international EHS standards grew, international standards for quality management and environmental program management have now been universally accepted (ISO, 2002). Occupational health nurses increasingly are becoming involved in efforts to help their employers or clients develop management systems to handle EHS issues--whether ISO 9000 (or the automotive equivalent, QS-9000), ISO 14000, or other models are used as the basis for the management system. Many nurses are actively involved in ISO certification efforts. As an extension of those efforts, occupational health nurses are increasingly involved in EHS audits, whether audits are conducted by third parties, by company employees, or as part of a self audit. The next column in this series will focus on strategies to improve the management of occupational health programs so the programs will stand up to rigorous EHS audits.