“…It is therefore important to split these projects into manageable phases, in order to limit risks to the current phase (as the project is appraised at the end of each phase and could be terminated at the gate before continuing to the next phase); to generate information to address uncertainties and risks in future phases; to ensure continued buy-in from all stakeholders; and to monitor and control project implementation progress [4,17,19,20,21,22,23,24,25,26,27,28,29,30,31,38]. As illustrated in Figure 2, the cumulative cost of a project typically follows an S-curve: initially, during the early phases -such as the pre-feasibility and feasibility phasesexpenditures rise gently and form a relatively small percentage of the total cost.…”