A comparison of TOPSIS, grey relational analysis and COPRAS methods for machine selection problem in the food industry of Turkey

Abstract

<div data-canvas-width="540.0693333333334">The paper aims to compare the results of the selection/choice of cream separators by using multi-criteria decision-making methods in an integrated manner for an enterprise with a dairy processing capacity of 80 to 100 tons per day operating in the Turkish food sector. A total of 7 alternative products and 7 criteria for milk processing were determined. Criterion weights were calculated using entropy method and then integrated into TOPSIS (Technique for Order Preference by Similarity to Ideal Solutions), GRA (Grey Relational Analysis) and COPRAS (Complex Proportional Assessment) methods. Sensitivity analyses were carried out on the results obtained from the three methods to check for their reliability. At the end of the study, similar alternative and appropriate results were found from the TOPSIS and COPRAS methods. However, different alternative but appropriate or suitable results were obtained from the GRA method. Sensitivity analysis of the three methods showed that all the methods used were valid. In the review of available and related literature, very few studies on machine selection in the dairy and food sector in general were found. For this reason, it is thought that the study will contribute to the decision-making process of companies in the dairy sector in their choice of machinery selections. As far as is known, this paper is the first attempt in extant literature to compare in an integrated manner the results of TOPSIS, COPRAS and GRA methods considered in the study.</div>

Personnel Selection Based on the LBWA, TOPSIS and GRA Methods: A Case Study on Foreign Trade Company

“…In contrast to earlier findings obtained from the TOPSIS method, the most optimal personnel are different in the GRA method. These findings were expected, as previous studies (Yiğit and Gök, 2017;Quan et al, 2019;Özcan and Çelik, 2021) have shown that the TOPSIS and GRA methods yield different rankings.…”

Analysis of Selection of Industrial Robots using COPRAS Methodology

“…As a result, the original issue is reduced to a judgement issue involving a single attribute. As a result, following the GRA procedure, solutions with numerous characteristics can be simply evaluated [18]. Furthermore, a comparison sequence is created by converting the behavior of each possibility into the primary step of GRA.…”

Selección de materiales para el diseño de ortesis aplicando Métodos Multicriterios, Simulación y Optimización Topológica

“…El método COPRAS se caracteriza por emplear un sistema de elección de preferencias de alternativas basado en soluciones positivas y negativas ideales [33]. Los pasos del método empleado se describen en el estudio de Salabun et al [34], posee un enfoque similar al método TOPSIS por lo que se mantienen las mismas consideraciones para los criterios positivos y negativos.…”