Comparison of performance of different criteria decision making methods in the selection of reinforced concrete mold system

Today, many different mold systems are used in reinforced concrete structures. In recent years, modern mold systems have been preferred in the constructions where the number of repeating layers is very high and the applications are difficult. Reinforced concrete formwork systems constitute an important part of the rough construction costs. So, at the beginning, during the design, the selection of the type of reinforced concrete formwork system to be used will have a direct impact on the quality, duration and cost of the construction project.A final judgment given by thinking about a business or problem is defined as Decision. Multi-Criteria Decision Making is the whole set of methods used to make the most appropriate decision by trying to reconcile these goals under the constraints set by the decision-maker when there are multiple conflicting goals. Today, there are many techniques used to solve multi-criteria decision making problems. In this study, a multi-criteria decision-making approach was used to analyze the reinforced concrete form system selection would be made by a construction company. For this purpose, MOORA, TOPSIS, VIKOR and Gray Relational Analysis methods were used to solve this problem separately and the results obtained by each method were compared with each other and their performances were examined. As a result of this study; it has been understood that the decision making models based on the MOORE, VIKOR, TOPSIS and Gray Relational Analysis approaches can be used by construction companies for the selection and evaluation of reinforced concrete formwork systems. It should also be emphasized that the analyzes made are not only quantitative values, but subjective evaluations given by decision makers based on their intuition, experience and expertise, digitizing and weighting in the process. These decision making models can also be used by construction contracting companies who are facing similar problems. Keywords: Gray relational analysis method, MOORA method, Multi criteria decision making (MCDM), TOPSIS method, VIKOR method.