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Syst."],"published-print":{"date-parts":[[2023,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The complex interval-valued intuitionistic fuzzy set (CIIFS), as an extension of the complex intuitionistic fuzzy set (CIFS), is one of the better tools for dealing with time-periodic information in a single set of two-dimensional information. So, this paper makes some new operators based on Aczel-Alsina\u2019s t-norm and t-conorm in the CIIFS environment. First, some Aczel-Alsina t-norm and t-conorm operational laws are defined for complex interval-valued intuitionistic fuzzy numbers (CIIFNs). Then, using the proposed operational laws, Aczel-Alsina The operators Complex interval-valued intuitionistic Aczel-Alsina weighted average (CIIFAAWA), Complex interval-valued intuitionistic Aczel-Alsina weighted geometric (CIIFAAWG), Complex interval-valued intuitionistic Aczel-Alsina ordered weighted average (CIIFAAOWA), and Complex interval-valued intuitionistic Aczel-Alsina ordered weighted geometric (CIIFAAOWG) are developed. Further, some properties of the proposed operators are discussed and investigated in detail. A group decision-making method is also suggested based on developed operators in the CIIFS environment. The proposed operators are more adaptable and give more accurate results than existing ones. Furthermore, a multi-criteria decision-making technique is developed based on the proposed operators. A decision-making problem for healthcare facilities in public hospitals is provided to demonstrate the benefits and applicability of the proposed method. Finally, a comparative study is also investigated using the existing methods.<\/jats:p>","DOI":"10.1007\/s40747-023-01090-8","type":"journal-article","created":{"date-parts":[[2023,6,19]],"date-time":"2023-06-19T02:01:23Z","timestamp":1687140083000},"page":"7103-7132","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Complex interval-valued intuitionistic fuzzy decision support system with application to COVID-19 healthcare facilities"],"prefix":"10.1007","volume":"9","author":[{"given":"Muhammad Sajjad Ali","family":"Khan","sequence":"first","affiliation":[]},{"given":"Saeed Ullah","family":"Jan","sequence":"additional","affiliation":[]},{"given":"Rahim","family":"Jan","sequence":"additional","affiliation":[]},{"given":"Tapan","family":"Senapati","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4587-7482","authenticated-orcid":false,"given":"Sarbast","family":"Moslem","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2023,6,19]]},"reference":[{"issue":"1","key":"1090_CR1","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1007\/s41066-017-0052-7","volume":"3","author":"H Garg","year":"2018","unstructured":"Garg H (2018) Some arithmetic operations on the generalized sigmoidal fuzzy numbers and its application. 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