The general purpose of this study is to investigate the effects of ISO 9001 certification on project success, and its main criteria into large-scale construction companies in Metro Manila, Philippines. For this aim, the research was conducted an in-depth literature review for identifying the main variables first. Subsequently, a survey questionnaire was designed, and distributed randomly among 67 managers working in ISO 9001:2008- certified projects of large-scale construction firms. Then the descriptive and inferential statistics analysis employed, in order to find the results and conclusions. Finally, the findings revealed that ISO 9001 certification can significatly affect the construction project success and its main criteria, except time lenght of projects in Metro Manila, Philippines.

Total quality management (TQM) is a management philosophy that emphasizes on non-stop quality improvement within all aspects of the organizations. Its main aims are to satisfy customers and survive in the market. Thus, it is very vital to specify the factors that cause implementing TQM successfully. Specially, the identification of the TQM critical success factors (CSFs) is more important in the construction firms than other industries, because the majority of construction organizations are confusing related to TQM CSFs, and often they do not develop a proper framework with right and essential factors for TQM implementation. Numerous studies showed construction companies usually fail to implement TQM and achieve performance excellence at project and enterprise levels. The main purpose of this study is to determine these factors as critical success factors of TQM implementation in construction industry. For this aim, the study carried out an extensive literature review to specify the most frequently used CSFs from TQM frameworks of 37 empirical studies in different industries, in order to propose a set of appropriate TQM CSFs. So, Pareto analysis was employed to analyze comprehensively the 37 TQM frameworks. Finally, the findings of this study revealed the seven CSFs, which are as most vital elements in developing an effective model for successful TQM implementation in construction industry.

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Total quality management (TQM) is a set of opinions and ideas that widely called "management philosophy". This management technique is able to assist the construction firms in improving