Journal profile · Computer Science, Artificial Intelligence
International Journal of Fuzzy Systems
ISSN 1562-2479 · eISSN 2199-3211 · Springer Berlin Heidelberg · TAIWAN · Quarterly · Founded 2015
International Journal of Fuzzy Systems: CAS Zone 4 · Computer Science (2025 upgraded edition); impact factor 3; hybrid open access; APC about USD 3,890; median 161 days to acceptance (104 articles, last 24 months); community-reported acceptance: fairly easy; 243 articles in 2025; indexed in SCIE and Scopus.
Scope
Aims, scope and focus
International Journal of Fuzzy Systems is published by Springer Berlin Heidelberg and is in Zone 4 of Computer Science in the CAS Journal Ranking (2025 upgraded edition). By OpenAlex counts of its recent articles, its largest topics are Multi-Criteria Decision Making, Fuzzy Logic and Control Systems and Fuzzy Systems and Optimization, together about 39.6% of its articles. Its main subfields are Control and Systems Engineering. (generated from OpenAlex topic counts and CAS ranking data)
The International Journal of Fuzzy Systems (IJFS) is an official journal of Taiwan Fuzzy Systems Association (TFSA) and is published semi-quarterly. IJFS will consider high quality papers that deal with the theory, design, and application of fuzzy systems, soft computing systems, grey systems, and extension theory systems ranging from hardware to software. Survey and expository submissions are also welcome.
From the journal's Aims & Scope
Research area (LetPub): Computer Science, Artificial Intelligence
Editor-in-chief Chin-Wang TaoPublisher website
Editorial board by country: 28 in mainland China (about 29%); most named Taiwan, China 46, Mainland China 28, United States 3, United Kingdom 3, Spain 3 (96 members with a country) Editorial board ↗Publisher website ·
Main research topics OpenAlex counts of recent articles; shares are approximate
- Multi-Criteria Decision MakingDecision Sciences19.7%
- Fuzzy Logic and Control SystemsComputer Science11.9%
- Fuzzy Systems and OptimizationMathematics8%
- Adaptive Control of Nonlinear SystemsEngineering8%
- Rough Sets and Fuzzy LogicComputer Science6.5%
- Optimization and Mathematical ProgrammingEngineering6.1%
- Stability and Control of Uncertain SystemsEngineering6%
- Neural Networks Stability and SynchronizationComputer Science4.1%
Rankings & indexing
CAS ranking and database indexing
CAS Journal Ranking
CAS Journal Ranking, upgraded edition (March 2025)Computer Science Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Computer Science | Zone 4 |
| Minor | Automation & Control Systems | Zone 3 |
| Minor | Computer Science, Artificial Intelligence | Zone 4 |
| Minor | Computer Science, Information Systems | Zone 4 |
Top journal: noReview journal: no
CAS Xinrui Journal Ranking (March 2026)Computer Science Zone 3
| Level | Category | Zone |
|---|---|---|
| Major | Computer Science | Zone 3 |
| Minor | Automation & Control Systems | Zone 3 |
| Minor | Computer Science, Artificial Intelligence | Zone 3 |
| Minor | Computer Science, Information Systems | Zone 3 |
Top journal: noReview journal: not marked
CAS Journal Ranking, previous upgraded edition (December 2023)Computer Science Zone 3
| Level | Category | Zone |
|---|---|---|
| Major | Computer Science | Zone 3 |
| Minor | Automation & Control Systems | Zone 3 |
| Minor | Computer Science, Artificial Intelligence | Zone 3 |
| Minor | Computer Science, Information Systems | Zone 3 |
Top journal: noReview journal: no
Database indexing
SCIEScopusLetPub
International journal early-warning lists: not listed in any editionLetPub
Indexing the journal's website claims
EI CompendexINSPECDBLPPublisher website
Other: Google Scholar, EBSCO, ProQuest, Dimensions, CNKI, Baidu, Naver, OCLC, Portico, CLOCKSS
As the journal's website lists them, not checked against each database; for Web of Science editions the records above apply.
Editions, and major and minor categories, are shown separately and never merged into one zone; check which edition your institution uses before you submit or report.
Metrics
Impact metrics and publication volume
Impact
- Impact factor
- 3LetPub ·
- Impact factor (publisher) 2025
- 3.1Publisher website ·
- 5-year impact factor (publisher) 2025
- 2.8Publisher website ·
- CiteScore 2026-06
- 8.3LetPub ·
- CiteScore (publisher)
- 3Publisher website ·
- SJR 2026-06
- 0.67LetPub ·
- SJR (publisher)
- 8.3Publisher website ·
- SNIP 2026-06
- 1.02LetPub ·
- SNIP (publisher)
- 0.67Publisher website ·
- h-index
- 31LetPub ·
- h-index
- 74OpenAlex ·
- i10-index
- 1,118OpenAlex ·
- 2-year mean citedness
- 3.4OpenAlex ·
- Self-citation rate
- 16.1%LetPub ·
- Share of gold OA articles
- 7.77%LetPub ·
Volume
- Articles per year
- 239LetPub ·
- Downloads per year (publisher) 2025
- 258,200Publisher website ·
Articles by year OpenAlex count · 2,356 in total · the current year is incomplete
| Year | Articles | Open access | Citations |
|---|---|---|---|
| 2026 | 134 | 21 | 38 |
| 2025 | 243 | 34 | 587 |
| 2024 | 259 | 27 | 1,535 |
| 2023 | 184 | 24 | 2,138 |
| 2022 | 212 | 36 | 3,127 |
| 2021 | 216 | 33 | 3,866 |
Sources count differently and were observed at different times, so each source's own value is kept; "publisher" marks figures from the journal's website.
Review & acceptance
Review time and acceptance
Review time from article dates manuscript dates registered with Crossref · to
161 daysMedian, submission to acceptance · P25–P75 112 days – 233 days
- Acceptance to online
- median 102 days (104 articles)
- Submission to online
- median 258 days
- Sample
- 104 articles with submission and acceptance dates (446 in the window); the latest was accepted on
Only articles that were accepted and published are counted, not the time spent on rejected manuscripts, so this usually runs longer than a publisher's "time to first decision".
Other sources
- Average review time (community reports)
- about 12 monthsLetPub ·
- Average acceptance (community reports)
- Fairly easyLetPub ·
- Submission to first decision
- 7 daysPublisher website ·
- Peer review
- Single anonymous peer review, Double anonymous peer reviewPublisher website
Community reports come from authors' own submissions (confidence 0.5) and are not a promise from the journal; for publisher figures, the journal's own definitions apply.
Fees & open access
APC and open-access policy
Hybrid open accessLetPub
A subscription journal in which authors can pay to publish their article open access.
| Source | APC | Fee waiver | License | Observed |
|---|---|---|---|---|
| OpenAlex | USD 3,890 / EUR 2,890 / GBP 2,490 | — | — | |
| Publisher website | USD 200 / USD 6,000 / USD 1,400 | — | — |
A hybrid journal charges the APC only when the author chooses open access; publishing under the subscription model is usually free.
Other charges and waivers (author guidelines)
- Page charges
- USD 45
- Submission fee
- USD 200
The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.
Submission
Article types and submission policies (journal website)
What to prepare5 items from the author guidelines
- Abstract
- 150–250 words
- Keywords
- ≥ 4
- Reference style
- Numbered, in order of citation
- Suggested reviewers
- Optional
- Highlights
- Required
Policy excerpts from the journal's websiteAI use, Authorship, Conflicts of interest, Data availability, License & copyright, Open access, Peer review
- AI use Generative AI Images
Please check Springer’s policy on generative AI images and make sure your work adheres to the principles described therein. Back to top
Source ↗Publisher website ·- Authorship Authorship principles
These guidelines describe authorship principles and good authorship practices to which prospective authors should adhere to. Authorship clarified The Journal and Publisher assume all authors agreed with the content and that all gave explicit consent to submit and that they obtained consent from the responsible authorities at the institute/organization where the work has been carried out, before th…
Source ↗Publisher website ·- Conflicts of interest Competing Interests
Authors are requested to disclose interests that are directly or indirectly related to the work submitted for publication. Interests within the last 3 years of beginning the work (conducting the research and preparing the work for submission) should be reported. Interests outside the 3-year time frame must be disclosed if they could reasonably be perceived as influencing the submitted work. Disclo…
Source ↗Publisher website ·- Data availability Data availability
The journal encourages authors to provide a statement of Data availability in their article. Data availability statements should include information on where data supporting the results reported in the article can be found, including, where applicable, hyperlinks to publicly archived datasets analysed or generated during the study. Data availability statements can also indicate whether data are av…
Source ↗Publisher website ·- License & copyright Copyright
Open Choice articles do not require transfer of copyright as the copyright remains with the author. In opting for open access, the author(s) agree to publish the article under a Creative Commons license. Details of the OA licences offered to authors can be found on the individual journal website, in the journal's How to publish with us guide. Back to top
Source ↗Publisher website ·- Open access Open access publishing
To find out more about publishing your work Open Access in International Journal of Fuzzy Systems, including information on fees, funding and licences, visit our Open access publishing page. Back to top
Source ↗Publisher website ·- Peer review Single-blind peer review
This journal follows a single-blind reviewing procedure. Back to top
Source ↗Publisher website ·
Excerpts are quoted from the journal's website; "model summary" lines are written by Workers AI and checked against the text. The journal's website is authoritative.
Profile
Publication details and official links
- Publisher
- Springer Berlin Heidelberg
- Country or region
- TAIWAN
- Language
- English
- Frequency
- Quarterly
- Founded
- 2015
- ISSN
- 1562-2479
- Electronic ISSN
- 2199-3211
- Society / sponsor
- Taiwan Fuzzy Systems Association
- Latest issue on the website
- Volume 28, Issue 6 (September 2026)
- Official links
- Journal homepage ↗OpenAlex
- Submission system ↗LetPub
- Author guidelines ↗LetPub
- Special issues ↗Publisher website
FAQ
Frequently asked questions about International Journal of Fuzzy Systems
What CAS zone is International Journal of Fuzzy Systems in?
In the 2025 upgraded edition of the CAS Journal Ranking, International Journal of Fuzzy Systems is in Zone 4 of Computer Science, and in Zone 3 of the minor category Automation & Control Systems / Computer Science, Artificial Intelligence / Computer Science, Information Systems. In the 2026 Xinrui edition it is in Zone 3 of Computer Science. Zones from different editions, and from major and minor categories, are not interchangeable.
What is the impact factor of International Journal of Fuzzy Systems?
The latest impact factor listed by LetPub is 3; CiteScore 8.3, h-index 74.
How long does peer review take at International Journal of Fuzzy Systems?
Based on the dates recorded on 104 articles published between October 2024 and October 2026 (the last 24 months), the median time from submission to acceptance is 161 days (interquartile range 112–233 days); authors report an average review time of about 12 months; the community-reported acceptance is “Fairly easy”. Article statistics cover accepted papers only, publisher figures follow the journal's own definitions, and community reports come from authors' own submissions; none is a promise from the journal.
What are the manuscript requirements of International Journal of Fuzzy Systems?
According to the journal's author guidelines: Abstract: 150–250 words; Keywords: ≥ 4; Reference style: Numbered, in order of citation; Suggested reviewers: Optional; Highlights: Required. A model extracted these from the author guidelines and each was checked against the text; check the latest version on the journal's website before submitting.
Where are the editorial board members of International Journal of Fuzzy Systems based?
Of the 96 board members whose country the journal's board page names, 28 (about 29%) are in mainland China; the countries named most often are Taiwan, China (46), Mainland China (28) and United States (3). Counted from the institutions listed on the board page; for reference only.
Which databases index International Journal of Fuzzy Systems?
According to LetPub and DOAJ records, International Journal of Fuzzy Systems is indexed in SCIE and Scopus. The journal's website also lists EI Compendex, INSPEC and DBLP; that list has not been checked against each database.
Is International Journal of Fuzzy Systems open access, and what is the APC?
International Journal of Fuzzy Systems is a hybrid journal. For open-access publication: APC about USD 3,890.
Sources and updates
The facts on this page come from LetPub, OpenAlex, Publisher website; every figure is tagged with its source and the date it was observed, and conflicting values are kept per source. LetPub source page: view ↗ (archived 2026-08-26). Last updated: .