Selection of Wall System Using Modified VIKOR and AHP

Abstract

This study applies a modified VIKOR method and an analytical hierarchy process (AHP) to solve wall system selection problems for a building project. The proposed approach allows decision-makers to understand the gaps between alternatives and aspired-levels in practice. Thirty decision criteria are used to establish a wall system selection framework for reducing the gaps to achieve the aspired-level. Two alternatives are determined including brick wall and precast wall. The modified VIKOR method is applied to establish the gaps in priorities between alternatives and aspired-levels. The AHP method is used to provide weights of criteria and validate the result. The best wall system was the precast wall. The results from two methods are consistent with each other. The modified VIKOR can undertake a pitfall of an original one because it can deal with two alternatives. The proposed approach can enhance performance of external-wall construction based on these gaps in priorities.