Office layout design is pertinent in terms of ergonomics to obtain a sustainable workspace. There are five workplace evaluation parameters to be considered, namely successiveness, work within the limits of biological ability, work within the limits of sustainable work performance, work within the social limits, and work fulfilling psychological expectations and individual satisfaction of being able to exercise all abilities. In ergonomics, job satisfaction is an essential matter for an employee to perform a task productively. Since the office design mostly affects the worker's performance and health at the same time, it is a requirement to create sustainable workplace. Multi-criteria decision-making methods are not only broadly used in different fields and disciplines, but are also considered to be an essential field in ergonomics. This paper aimed to propose a method in order to analyze and compare the office layout design with the methods of analytical hierarchy process, elimination and choice translating reality, and permutation method. The criteria in this paper are established in a hierarchical order by employing these methods. All in all, office alternatives are compared, and the overall results are examined.

Dental supplier selection is a process that allows companies to choose their suppliers correctly in the light of evaluations. Choosing the right dental suppliers is an important factor both for the efficiency of dental treatment and handling an impressive supply chain. Dental supplier selection is a multi-criterion group decision-making (MCDM) problem that contains many different criterion about the decision-makers generally ambiguous information. TOPSIS method integrated intuitionistic fuzzy set is used in this study. Real-life problems include many unpredictability and defects. Experts are involved in assigning the weights of the criterion in this study. Linear programming (LP) methodology has applied for the ranking of these weights of criterion. Then, the LP methodology is carried out and it was ensured that the appropriate orthodontic bracket suppliers were selected. This is a specific multi-criterion decision making problem. The study was followed together with the sensitivity analyses of the results. At the end of the study, it is foreseen that with the right selection of suppliers, The competitive power of companies in the market and end user satisfaction will increase.