This research has studied the impact of ISO 9001 on certified Ethiopian construction companies. The objective of this research is to determine if Ethiopian ISO 9001 certified construction companies have benefited from obtaining the certification and investigate the main reasons if they have not. To carry out this study, pieces of literatures are reviewed and briefly organized in to subtopics under the literature review part. A questionnaire is designed based on the literature review and distributed to ISO certified construction companies, then collected and analyzed. Interview was also conducted to validate the information collected through questionnaire and get additional information which was not covered in the questionnaire.
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