In recent years, considering the whole project life cycle and its costs has become a growing trend in major projects. This analysis initially considered concept to commissioning; later, particularly after Brent Spar, concept to decommissioning was considered. Optimal solutions are sought within this whole project life cycle. However, the field of optimization still tends to focus on improving the performance of project elements or small subsystems within the project. Optimization across the whole project life cycle is not normally carried out. This paper proposes a general system for a global-optimization model that allows the whole project to be considered within a single optimization.
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