Quality Assurance (QMS Overview) In March 2002 ESN's customer / performance focused QUALITY MANAGEMENT SYSTEM was independently registered to ISO 9001:2000 standards.   Independent surveillance audits are conducted every six months to ensure ESNs QMS System continues to comply with the requirements of the standard. In March 2004 the fourth surveillance audit, conducted by an independent auditor, was successfully completed   Our QMS program ensures performance is delivered consistent with the requirements of the contract, task, delivery order and customer expectations.   Central components of the QMS program are Customer Satisfaction and Continuous improvement. With emphasis placed here, innovative approaches, efficiencies and economies can be implemented to provide cost savings while ensuring best practices are maintained QA Links: Task Performance Assurance Process Process Control Document (ISO QSP-022) pdf. file