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In decision making with PHFSs, aggregation operators play a key role because they can be used to synthesize multidimensional evaluation values represented as Pythagorean hesitant fuzzy values into collective values. Under PHFS environments, Pythagorean hesitant fuzzy ordered weighted averaging and Pythagorean fuzzy ordered weighted geometric operators are used to aggregate the Pythagorean hesitant fuzzy values. The main advantage of these operators is that they provide more accurate and valuable results. Furthermore, these operators are applied to decision-making problems in which experts provide their preferences in the Pythagorean hesitant fuzzy environment to show the validity, practicality, and effectiveness of the new approach. Finally, we compare the proposed approach to the existing methods.<\/jats:p>","DOI":"10.1515\/jisys-2017-0231","type":"journal-article","created":{"date-parts":[[2018,1,5]],"date-time":"2018-01-05T17:17:05Z","timestamp":1515172625000},"page":"154-171","source":"Crossref","is-referenced-by-count":13,"title":["Pythagorean Hesitant Fuzzy Information Aggregation and Their Application to Multi-Attribute Group Decision-Making Problems"],"prefix":"10.1515","volume":"29","author":[{"given":"Muhammad Sajjad Ali","family":"Khan","sequence":"first","affiliation":[{"name":"Department of Mathematics , Hazara University , Mansehra , Pakistan"}]},{"given":"Saleem","family":"Abdullah","sequence":"additional","affiliation":[{"name":"Department of Mathematics , Abdul Wali Khan University , Mardan , Pakistan"}]},{"given":"Asad","family":"Ali","sequence":"additional","affiliation":[{"name":"Department of Mathematics , Hazara University , Mansehra , Pakistan"}]},{"given":"Khaista","family":"Rahman","sequence":"additional","affiliation":[{"name":"Department of Mathematics , Hazara University , Mansehra , Pakistan"}]}],"member":"374","published-online":{"date-parts":[[2018,1,5]]},"reference":[{"key":"2025120523293229964_j_jisys-2017-0231_ref_001","doi-asserted-by":"crossref","unstructured":"K. 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