“…The constraints include unreliable, unquantifiable, unpredictable, fragmented, unique, and repetitive processes and program, high initial and setup costs, incompatible regulations, poor skills and knowledge, traditional industry and market culture, and incompatible supply chain and procurement. Several research projects have been conducted to identify the factors that drove or constrained the uptake of OSP (e.g., Blismas et al, 2005;Bottom et al, 1994;Sparkman et al, 1999, Gibb, 2000Fox, Marsh and Cockerham, 2001;Gibb and Isack, 2003;Housing Forum, 2002;Neale, Price and Sher, 1993).…”