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Recent extensions use Hesitant Fuzzy Sets (HFS) to consider uncertain evaluations. However, deterministic parameters are considered, which avoids the application to cases in which non-fuzzy scores and unstable parameters are available. In this study, an approach is proposed for: 1) modeling hesitant outranking functions originated from unstable parameters provided by several DMs; 2) using the HFS to calculate the ELECTRE TRI-C indices; 3) reducing the DMs cognitive effort when they are asked to provide information. An application to supplier development is presented by using ELECTRE TRI-C. Results are compared by using different HFS aggregation operators and sensitivity analysis shows that a robust conclusion can be obtained. Future lines of research are also suggested.<\/jats:p>","DOI":"10.3233\/jifs-190166","type":"journal-article","created":{"date-parts":[[2019,11,26]],"date-time":"2019-11-26T11:04:16Z","timestamp":1574766256000},"page":"7923-7933","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":5,"title":["ELECTRE TRI-C with hesitant outranking functions: Application to supplier development"],"prefix":"10.1177","volume":"37","author":[{"given":"Javier","family":"Pereira","sequence":"first","affiliation":[{"name":"Universidad Tecnol\u00f3gica de Chile INACAP, Santiago, Chile \u2013 UFPE (PRONEX Researcher)"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elaine C.B.","family":"de Oliveira","sequence":"additional","affiliation":[{"name":"IFPB, Campus Jo\u00e3o Pessoa, Jo\u00e3o Pessoa, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Danielle C.","family":"Morais","sequence":"additional","affiliation":[{"name":"UFPE, Recife, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ana Paula C.S.","family":"Costa","sequence":"additional","affiliation":[{"name":"UFPE, Recife, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pilar","family":"Arroyo-L\u00f3pez","sequence":"additional","affiliation":[{"name":"Tecnologico de Monterrey, Campus Toluca, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2019,11,23]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"crossref","unstructured":"AissiH. 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