{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,16]],"date-time":"2026-03-16T10:10:13Z","timestamp":1773655813519,"version":"3.50.1"},"reference-count":33,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2019,10,31]],"date-time":"2019-10-31T00:00:00Z","timestamp":1572480000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Fundamental Research Grant Scheme (Universiti Teknologi PETRONAS)","award":["Cost centre: 015MA0-021"],"award-info":[{"award-number":["Cost centre: 015MA0-021"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>Fuzzy techniques have been suggested as useful method for forecasting performance. However, its dependency on experts\u2019 knowledge causes difficulties in information extraction and data collection. Therefore, to overcome the difficulties, this research proposed a new type 2 fuzzy time series (T2FTS) forecasting model. The T2FTS model was used to exploit more information in time series forecasting. The concepts of sliding window method (SWM) and fuzzy rule-based systems (FRBS) were incorporated in the utilization of T2FTS to obtain forecasting values. A sliding window method was proposed to find a proper and systematic measurement for predicting the number of class intervals. Furthermore, the weighted subsethood-based algorithm was applied in developing fuzzy IF\u2013THEN rules, where it was later used to perform forecasting. This approach provides inferences based on how people think and make judgments. In this research, the data sets from previous studies of crude palm oil prices were used to further analyze and validate the proposed model. With suitable class intervals and fuzzy rules generated, the forecasting values obtained were more precise and closer to the actual values. The findings of this paper proved that the proposed forecasting method could be used as an alternative for improved forecasting of sustainable crude palm oil prices.<\/jats:p>","DOI":"10.3390\/sym11111340","type":"journal-article","created":{"date-parts":[[2019,10,31]],"date-time":"2019-10-31T06:33:29Z","timestamp":1572503609000},"page":"1340","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Type 2 Fuzzy Inference-Based Time Series Model"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1258-3840","authenticated-orcid":false,"given":"Nur Fazliana","family":"Rahim","sequence":"first","affiliation":[{"name":"Centre for Pre University Studies, Universiti Malaysia Sarawak, Kota Samarahan, Sarawak 94300, Malaysia"},{"name":"Fundamental and Applied Sciences Department, Universiti Teknologi PETRONAS, Seri Iskandar, Perak 32610, Malaysia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5791-2815","authenticated-orcid":false,"given":"Mahmod","family":"Othman","sequence":"additional","affiliation":[{"name":"Fundamental and Applied Sciences Department, Universiti Teknologi PETRONAS, Seri Iskandar, Perak 32610, Malaysia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rajalingam","family":"Sokkalingam","sequence":"additional","affiliation":[{"name":"Fundamental and Applied Sciences Department, Universiti Teknologi PETRONAS, Seri Iskandar, Perak 32610, Malaysia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Evizal","family":"Abdul Kadir","sequence":"additional","affiliation":[{"name":"Faculty of Engineering, Universitas Islam Riau, Pekan Baru, Riau 28284, Indonesia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,10,31]]},"reference":[{"key":"ref_1","first-page":"6159","article-title":"Volatility modelling and forecasting of Malaysian crude palm oil prices","volume":"8","author":"Ahmad","year":"2014","journal-title":"Appl. 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