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Recent focus on sustainability and its three pillars (economic, environmental, and social) brought new issues, especially for manufacturing companies, to be addressed. The article uses the methodology of a case study based on observation, panel expert, interviews with employees and the documentation analysis. The research had been carried out in steel processing enterprise in West Pomeranian region in Poland. The purpose of the article is twofold. Firstly, the aim is to present the company in the context of the production scheme and information flow, as well as the scheme for solving a decision problem that may increase the company's sustainable development potential. Secondly, the aim of the paper is to present the methodology of the process of selecting and assessing a range of criteria and fields of operation based on the identified sustainability criteria, which should be taken into account when deciding what type of the product to choose to improve the potential of sustainability of the company. The described methodology of this process is a scientific contribution based on literature research, observation of the company under study, interviews with employees, analysis of documents and work with experts inside the company, which allowed the creation of a tool for determining operational and decision-making areas that are directly related to the company's sustainable development potential. [ABSTRACT FROM AUTHOR]

Decision-making processes increasingly use models based on various methods to ensure professional analysis and evaluation of the considered alternatives. However, the abundance of these methods makes it difficult to choose the proper method to solve a given problem. Also, it is worth noting whether different results can be obtained using different methods within a single decision problem. In this paper, we used three selected Multi-Criteria Decision Analysis (MCDA) methods called COMET, TOPSIS, and SPOTIS in order to examine how the obtained rankings vary. The selection of material suppliers was taken into consideration. The equal weights, entropy and standard deviation methods were used to determine the weights for criteria. Final preferences values were then compared with the WS similarity coefficient and weighted Spearman correlation coefficient to check the similarity of the received rankings. It was noticed that in the given problem, all of the methods provide highly correlated results, and the obtained positional rankings are not significantly different. However, practical conclusions indicate the need to look for improved solutions in the correct and accurate assessment of suppliers in a given period. [ABSTRACT FROM AUTHOR]