“…Other categorisation of sub-contract works include categorisation by capability profile (Lehtinen, 2001) functional participation (Tam, Shen, & Tam, 2007), methods of payment (Ramus, Birchall & Griffiths, 2006), and nature of work rendered on a project (Ramus et al, 2006). Irrespective of the categorisation discussed, subcontractors are a vital component of construction projects (Yin, Wang, Yu, Ji, & Ni, 2009) because major aspects of construction project works are performed by them (Andreas, Florence, & Jane, 2009). With increasing complexities of construction projects (Ahuja, Dozzi, & Abourizk, 1994) and improved procurement systems, main contractors' roles have become limited to the management of work interfaces while offering physical execution of construction tasks to subcontractors (Humphreys, Matthews, & Kumaraswamy, 2003).…”