. The construction industry products are usually created based on request from the clients (government organizations or private sector) by the contracted second party (contractor) who mobilizes various resources such as construction material, equipment and labor, which are supplied by a series of suppliers then assembled at the project site by the various contractors (prime and sub-contractors).The supply chain within the construction production process during the construction stage has been identified, in light of investigating the quality assurance processes within each supply chain components. Observations are made by survey to project sites through semi-structured depth interviewing for all the supply chain actors within the case study projects. Indicators used in the survey are based on ISO 9001:2000 procedures already adopted by the contractors. The observation result shows that there are four basic elements required to assure the quality of the product: defining project scope, specifying features and baseline system, build product, and deliver product to customer. To implement these elements, twelve steps need to be completed by the supply chain parties in order to accomplish quality assurance process. The process is found to be very similar with those of ISO 9001:2000 standards.The result of this study is expected to be usefull for parties involved in construction industry in setting up their supply chain, where quality assurance of the construction products is a major issue in improving costumer satisfaction.