PMID- 38144291 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20231225 IS - 2405-8440 (Print) IS - 2405-8440 (Electronic) IS - 2405-8440 (Linking) VI - 9 IP - 12 DP - 2023 Dec TI - Streamlining apartment provider evaluation: A spherical fuzzy multi-criteria decision-making model. PG - e22353 LID - 10.1016/j.heliyon.2023.e22353 [doi] LID - e22353 AB - In the context of the thriving real estate market in developing countries like Vietnam, understanding consumer preferences and effectively addressing them through a comprehensive multi-criteria decision-making (MCDM) framework is paramount for real estate providers. This study presents a two-stage MCDM model that integrates the Delphi technique and the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) based on Spherical Fuzzy Sets (SFSs). Initially, the SF-Delphi technique validates critical criteria influencing customers' apartment selection in Vietnam. Secondly, the SF-TOPSIS method evaluates the top ten apartment providers. To ensure robustness and validity, a comparative analysis compares the results with those from the Intuitionistic Fuzzy TOPSIS (IF-TOPSIS) and Fuzzy TOPSIS (F-TOPSIS) methods. Subsequently, five rank correlation coefficients (Spearman, Kendall, Goodman-Kruskal, Weighted rank measure of correlation, Weighted Similarity) are used to assess the relationships between various TOPSIS techniques applied to apartment suppliers in Vietnam. The correlation coefficients demonstrate strong agreement among the TOPSIS methods, with the smallest coefficient being 0.7778, surpassing the threshold of 0.7. This high level of consistency confirms the efficacy of the proposed TOPSIS approach with different Fuzzy Sets in reliably evaluating customers' preferences for apartment suppliers. Notably, the legal aspect's prominence underscores its critical role in shaping customer choices, emphasizing the significance of considering legal factors in the context of apartment supply and demand in Vietnam. Furthermore, using SFSs makes this approach particularly suited to capture consumer perceptions within the dynamic and uncertain business environment characterized by volatility, uncertainty, complexity, and ambiguity (VUCA). CI - (c) 2023 The Authors. FAU - Nguyen, Phi-Hung AU - Nguyen PH AD - Research Center of Applied Sciences, Faculty of Business, FPT University, Hanoi 100000, Viet Nam. FAU - Tran, Thu-Hien AU - Tran TH AD - Department of Business Management, National Taipei University of Technology, Taipei 10608, Taiwan. FAU - Thi Nguyen, Lan-Anh AU - Thi Nguyen LA AD - Research Center of Applied Sciences, Faculty of Business, FPT University, Hanoi 100000, Viet Nam. FAU - Pham, Hong-Anh AU - Pham HA AD - Research Center of Applied Sciences, Faculty of Business, FPT University, Hanoi 100000, Viet Nam. FAU - Thi Pham, Mai-Anh AU - Thi Pham MA AD - Research Center of Applied Sciences, Faculty of Business, FPT University, Hanoi 100000, Viet Nam. LA - eng PT - Journal Article DEP - 20231203 PL - England TA - Heliyon JT - Heliyon JID - 101672560 PMC - PMC10746397 OTO - NOTNLM OT - Apartment selection OT - Delphi OT - MCDM OT - Real estate OT - Spherical fuzzy sets OT - TOPSIS COIS- The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2023/12/25 06:42 MHDA- 2023/12/25 06:43 PMCR- 2023/12/03 CRDT- 2023/12/25 04:29 PHST- 2023/04/24 00:00 [received] PHST- 2023/10/29 00:00 [revised] PHST- 2023/11/09 00:00 [accepted] PHST- 2023/12/25 06:43 [medline] PHST- 2023/12/25 06:42 [pubmed] PHST- 2023/12/25 04:29 [entrez] PHST- 2023/12/03 00:00 [pmc-release] AID - S2405-8440(23)09561-0 [pii] AID - e22353 [pii] AID - 10.1016/j.heliyon.2023.e22353 [doi] PST - epublish SO - Heliyon. 2023 Dec 3;9(12):e22353. doi: 10.1016/j.heliyon.2023.e22353. eCollection 2023 Dec.