Alternative Selection of Sea Platform Considering Multi-perspective Indices

The optimization of the offshore platform scheme has been recognized as one of the most significant phases in the construction of the offshore platform, because it determines the direction of the optimal design of the offshore platform structure. However, to select the optimal one among several schemes, a comprehensive evaluation of the estimated values of multiple attributes must be performed, which is difficult because the estimation of attributes is inaccurate and the evaluation needs to be combined with the expert's preference. This paper proposes a framework combining Analytic Hierarchy Process (AHP) with Grey Relational Analysis (GRA) to solve the problem of optimization of offshore platform scheme. An AHP is presented to determine the weight of each evaluation criterion. Then, using GRA to determine the best of the four to-be-evaluated schemes. Conducting a case study to verify the performance of the proposed method. The results show that the proposed multi -attribute decision theory can decide the best design alternative.