Which of the following is NOT one of the five main procurement methods?

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The key idea here is understanding the common ways projects are contracted for in construction. The five main procurement routes typically taught are traditional (design and build as separate stages with a main contractor), design and build (design and construction under one contract), management contracting, construction management, and partnering (a collaborative approach). Turnkey isn’t usually listed as one of these main routes. Instead, a turnkey arrangement aims to deliver a complete, ready-to-use facility for a fixed price and date, with the contractor taking on design and construction to hand over a finished product. While it can be used within certain design-and-build contexts, it’s treated as a contract type or delivery form rather than one of the standard procurement routes. So the option describing turnkey is the one that isn’t among the five main procurement methods.