Recently in GC(General Contractor), procurement systems of component and labor for building construction have wide range of variations. The site-procurement means purchases of building components and contracting with sub-contractors in a site. On the other hand, the procurement for multi-sites is managed by a special division in GC aiming for scale merit and efficiency. This paper tries to classify various procurement systems into several basic patterns. First, this paper examines the similarity and difference between typical two types of procurement system. Then, it is shown that the classification of basic patterns of procurement systems is available by using the important two factors of the procurement for multi-sites. Finally procurement system in a construction project is defined and exemplified by the combination of proposed basic patterns.
