International Journal of Systems Science

International Journal of Systems Science is published by Taylor & Francis 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 Stability and Control of Uncertain Systems, Adaptive Control of Nonlinear Systems and Control Systems and Identification, together about 34.8% of its articles. Its main subfields are Control and Systems Engineering. (generated from OpenAlex topic counts and CAS ranking data)

International Journal of Systems Science (IJSS) is a world leading journal dedicated to publishing high quality, rigorously reviewed, original papers that contribute to the methodology and practice in emerging systems engineering themes of intelligence, autonomy and complexity. Modern systems are becoming more and more complex and sophisticated in their demand for performance, reliability and increasing autonomy. Historically, highly analytic and numeric-based methods have sufficed, frequently simplifying the problem to allow analytical tractability. Many manufactured and natural systems (biological, ecological and socio-economic) cannot be adequately represented or analyzed without requiring multiple interacting and interconnected frameworks and a common information-processing framework. A wide range of new theories, methodologies and techniques are required to ‘enable’ such systems, and thus engineering and integration to deal with these demands. IJSS therefore encourages original submissions in these areas, with special focus on papers that are strongly novel as well as not being overly applied. Proposals for special issues in cutting-edge areas of systems science are encouraged, and should be discussed with the Editor-in-Chief. Papers that cover those topics related to operations management and logistics will not be accepted for publication in IJSS. Instead they should be submitted directly to sister journal International Journal of Systems Science: Operations & Logistics. Queries regarding submissions can be made by contacting the Editor-in-Chief, whose decision is final.

From the journal's Aims & Scope

Research area (LetPub): Computer Science, Theory & Methods

Editor-in-chief Zidong WangPublisher website

Editorial board by country: none in mainland China; most named United Kingdom 4, Australia 2 (6 members with a country) Editorial board ↗Publisher website · 2026-10-01

CAS Journal Ranking

JCR / CiteScore quartiles on the journal's website

• JCR Q1 · best quartile · 2025
• CiteScore Q1 · 2025

Publisher-reported: JCR figures are Clarivate's and CiteScore figures Scopus's to confirm; both are a different system from the CAS zones.Publisher website

Database indexing

SCIEScopusLetPub

International journal early-warning lists: not listed in any editionLetPub

Indexing the journal's website claims

EI CompendexWeb of ScienceINSPECMathSciNetzbMATHDBLPCurrent ContentsPublisher website

Other: Google Scholar, EBSCO, ACM Digital Library, Astrophysics Data System, Naver, OCLC, Portico, CLOCKSS, Crossref, British Library, EBSCO - Applied Science & Technology Source, EBSCO - Academic Search Complete, EBSCO - STM Source, E-LIB (University of Bremen), Excellence in Research for Australia (ERA), Microsoft Academic, Naver Corporation, SAO/NASA Astrophysics Data System Abstract Service, SCImago (Elsevier), Ulrich's Periodicals Directory, WorldCat Local (OCLC), Zetoc

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.

Impact

Impact factor

4.31LetPub · 2026-09-13

Impact factor (publisher) 2025

4.3Publisher website · 2026-10-01

5-year impact factor (publisher) 2025

3.5Publisher website · 2026-10-01

CiteScore 2026-06

8.1LetPub · 2026-09-13

CiteScore (publisher) 2025

8.1Publisher website · 2026-10-01

SJR 2026-06

1.03LetPub · 2026-09-13

SJR (publisher) 2025

1.03Publisher website · 2026-10-01

SNIP 2026-06

1LetPub · 2026-09-13

SNIP (publisher) 2025

1Publisher website · 2026-10-01

h-index

59LetPub · 2026-09-13

h-index

110OpenAlex · 2026-10-01

i10-index

3,427OpenAlex · 2026-10-01

2-year mean citedness

3.62OpenAlex · 2026-10-01

Self-citation rate

16.3%LetPub · 2026-09-13

Share of gold OA articles

1.92%LetPub · 2026-09-13

Volume

Articles per year

407LetPub · 2026-09-13

Downloads per year (publisher)

172,000Publisher website · 2026-10-01

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.

Other sources

Average review time (community reports)

about 4.5 monthsLetPub · 2026-09-13

Average acceptance (community reports)

66%LetPub · 2026-09-13

Acceptance rate (publisher)

20%Publisher website · 2026-10-01

Submission to first decision

8 daysPublisher website · 2026-10-01

First decision after review

65 daysPublisher website · 2026-10-01

Acceptance to publication

15 daysPublisher website · 2026-10-01

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.

The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.

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.

Publisher

Taylor & Francis

Country or region

ENGLAND

Language

English

Frequency

Monthly

Founded

1970

ISSN

0020-7721

Electronic ISSN

1464-5319

Latest issue on the website

Volume 57, Issue 14 (2026)

Official links

• Journal homepage ↗OpenAlex
• Submission system ↗Publisher website
• Special issues ↗Publisher website