In this view, construction is an economic activity that crosses over all three economic sectors: primary sector that involves the extraction of natural resources secondary sector that involves the manufacture of building materials and components, and the transformation of these materials into finished buildings and tertiary sector that involves the provision of consultancy services such as project management, design and structural engineering (Gruneberg, 1997). At one extreme, construction is referred to as an economic activity that involves the entire construction process from producing raw and manufactured building materials and components, and providing professional services such as design and project management, to executing the physical work on site. Generally, there are three levels to define construction within the literature (Dang & Low, 2015).
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