“…Clarity of any procurement decision based on bargaining power is influenced by: main contractor's market knowledge (Mahamid, 2017;Melese et al, 2017); Supply chain management priority and value of the product or service to the main contractor (Perez et al, 2016;De Valence, 2018); and Buyer-supplier relationship Co-operation, risk perception demand forecasting mechanism of the main contractor (Walker et al, 2017;Xue et al, 2017;Yang et al, 2017) Project partnering Decision-making, performance improvement, resources, risk perception Market structure "Market structure"-based bargaining is influenced by: competitors offering similar services (Wang et al, 2016;Børve et al, 2017;Kerkhove and Vanhoucke, 2017); Project partnering Decision-making availability of credible substitutes for products and services being offered (Love et al, 2019;Lu et al, 2017); Opportunism scarce products (Thunberg et al, 2017;Walker et al, 2017); and Opportunism entry barriers for new sub-contractors (Thunberg et al, 2017;Walker et al, 2017;Kapogiannis and Sherratt, 2018;Noorizadeh et al, 2019) Power regimes…”