The purpose of this paper is to find out the impact of Quality Management System (QMS)
ISO/IEC 17025:2005 certification audit on company's Performance. Libyan petroleum Institute
has been certified ISO/IEC 17025:2005 for 8 years. Therefore, it is necessary to study and
analyze the impact of that certification on its performance. Survey study has been done by
distributing a questionnaire by handing it personally to qualified staff in the 15 accredited
laboratories in the institute. The response rate was 66.6%. The statistical operations with the
results of analytical study have been done to achieve the goal and objectives of the research.
Finally, ISO/IEC 17025:2005 certification audit is found to have a positive effect on the