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When the products\u2019 quality counts on two or more correlated characteristics, multivariate process capability indices are applied. In this paper, we focus on two indices proposed by Shahriari and Abdollahzadeh (2009) and Taam et al. (1993). The traditional multivariate capability indices can\u2019t be applied if the specification limits and target value of each characteristic are presented in a linguistic form. Instead, the fuzzy set theory is used to deal with these circumstances. Here, the fuzzy formulations of the indices are developed. Furthermore, numerical examples are presented to illustrate the applicability of the proposed methods and we make a comparison between them.<\/jats:p>","DOI":"10.3233\/ifs-151823","type":"journal-article","created":{"date-parts":[[2016,2,9]],"date-time":"2016-02-09T10:57:18Z","timestamp":1455015438000},"page":"1007-1017","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":2,"title":["Fuzzy multivariate process capability vector"],"prefix":"10.1177","volume":"30","author":[{"given":"Zainab","family":"Abbasi Ganji","sequence":"first","affiliation":[{"name":"Ferdowsi University of Mashhad","place":["Iran"]}]},{"given":"Bahram","family":"Sadeghpour Gildeh","sequence":"additional","affiliation":[{"name":"Ferdowsi University of Mashhad","place":["Iran"]}]}],"member":"179","published-online":{"date-parts":[[2015,11,2]]},"reference":[{"key":"e_1_3_1_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/0377-2217(83)90100-5"},{"key":"e_1_3_1_3_2","doi-asserted-by":"publisher","DOI":"10.1080\/16843703.2005.11673094"},{"issue":"1","key":"e_1_3_1_4_2","first-page":"1","article-title":"Multivariate measure of process capability","volume":"11","author":"Chan L.K.","year":"1991","unstructured":"ChanL.K., ChengS.W. and SpringF.A., Multivariate measure of process capability, Journal of Modeling and Simulation 11(1) (1991), 1\u20136.","journal-title":"Journal of Modeling and Simulation"},{"key":"e_1_3_1_5_2","first-page":"749","article-title":"A multivariate process capability index over a rectangular solid tolerance zone","volume":"4","author":"Chen H.","year":"1994","unstructured":"ChenH., A multivariate process capability index over a rectangular solid tolerance zone, Statistica Sinica 4 (1994), 749\u2013758.","journal-title":"Statistica Sinica"},{"key":"e_1_3_1_6_2","doi-asserted-by":"publisher","DOI":"10.1002\/qre.513"},{"key":"e_1_3_1_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/0165-0114(95)00273-1"},{"key":"e_1_3_1_8_2","doi-asserted-by":"publisher","DOI":"10.1002\/qre.1120"},{"key":"e_1_3_1_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejor.2007.02.023"},{"key":"e_1_3_1_10_2","first-page":"299","volume-title":"In Statistical Process Control in Manufacturing","author":"Hubele H.F.","year":"1991","unstructured":"HubeleH.F., ShahriariH. and ChengC.S., A bivariate process capability vector. 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