Mandal, ShubhenduGazi, Kamal HossainGiri, Bibhas C.Salahshour, SohailMondal, Sankar Prasad2026-02-152026-02-1520260399-05592804-730310.1051/ro/20251472-s2.0-105027333908https://doi.org/10.1051/ro/2025147https://hdl.handle.net/20.500.14517/8781Mondal, Sankar Prasad/0000-0003-4690-2598Despite the abundance of reports of mental disorders in medical diagnosis, few studies have employed standard techniques on representative patient groups. Psychiatric disorders are currently the most frequent cause of extended absences due to illness. Fuzzy Multi-Criteria Decision-Making (MCDM) techniques can be helpful in selecting appropriate treatments or interventions for patients with psychiatric disorders. These techniques enable decision-makers to consider multiple criteria that may have varying levels of importance or uncertainty. In this paper, interval-valued Pythagorean trapezoidal fuzzy numbers (IVPTrFN) are used to handle uncertainty or imprecision in a more complex manner. The Fuzzy Analytic Hierarchy Process (FAHP) is used to determine the symptom weight of a patient with a psychiatric disorder. Using this weight, the rank of the alternative disorder of a patient is determined by the Fuzzy Preference Ranking Organization Method for Enrichment Evaluation (FPROMETHEE) technique. Finally, sensitivity and comparative analyses are conducted to assess the reliability and consistency of the results.eninfo:eu-repo/semantics/openAccessPsychiatric DisorderFuzzy NumbersIVPTRFNFAHPFPROMETHEEArticle