What is the Impact Factor of Grey Systems-Theory and Application?

According to the latest Clarivate Journal Citation Reports (JCR), the Journal Impact Factor of Grey Systems-Theory and Application is 4.60, ranking in quartile Q1 of Web of Science (SCIE).

Is Grey Systems-Theory and Application indexed in Web of Science or Scopus?

Yes, Grey Systems-Theory and Application is indexed in Web of Science (SCIE, Q1 quartile). Furthermore, in Scopus (SCImago), it holds an SJR rating of 0.556 (Q2) and an H-index of 35.

Who publishes Grey Systems-Theory and Application and what is the Article Processing Charge (APC)?

Grey Systems-Theory and Application is published by EMERALD GROUP PUBLISHING LTD. The estimated Article Processing Charge (APC) is approximately $2,992 USD, subject to institutional waivers and corresponding author affiliations.

What is the ISO-4 abbreviation and acronym of Grey Systems-Theory and Application?

The official ISO-4 abbreviation of Grey Systems-Theory and Application is "GREY SYST". This standardized title abbreviation is used in citation lists conforming to IEEE, APA, Harvard, or Vancouver styles.

WoS SCIE Q1Scopus Q2SCImago #10,666Subscription

Grey Systems-Theory and Application

Abbreviation (ISO):GREY SYST

•

Identifier (ISSN):2043-9377(Print)/2043-9385(Online)

•

Publisher:EMERALD GROUP PUBLISHING LTD

Compare

Clarivate IF (2026)

4.6↑ +0.2

Journal Impact Factor

IF Trend↓

WoS Quartile

WoS SCIEJCR Quartile

Clarivate WoS JCR

WoS Categories↓

JCR Release Date: 2026-06-17

Impact Factor Trend (2020–2026)

Clarivate IF trend for Grey Systems-Theory and Application

WoS Q1

Annual Impact Factor Metric

Current (2026):4.6

Scopus SJR & RankScopus Q2

0.556

#10,666

SCImago Journal Rank citation prestige weighting

Scopus Year: 2025

H-Index (2025)

35 papers with at least that number of citations each

WoS: SCIE / JCRQ1

Self-Citation Rate34.4%

Safe Level (< 15%)Warning Level (> 20%)

Self-citation below 15% indicates strong scholarly independence.

Volume & Open AccessSubscription

35articles/year

0% Gold OA•92.31% Original Research

Aims & Scope

Grey Systems-Theory and Application (abbr: GREY SYST, ISSN: 2043-9377) is a peer-reviewed international scholarly journal in the field of MATHEMATICS, published by EMERALD GROUP PUBLISHING LTD in England. The periodical holds a Journal Impact Factor (JIF) of 4.60, ranking in quartile Q1 of Web of Science (SCIE), a Scopus SJR indicator of 0.556 (Q2), an H-index of 35.

Topics Covered (Recognized by AI)

Computer science90.7%Mathematics87.6%Economics62.2%Statistics60.6%Engineering54.3%Machine learning48.2%Artificial intelligence47.5%Physics43.9%Biology42.8%Political science42.3%Law41.4%Business31.7%Philosophy30.5%Data mining29.2%Psychology27.4%Operations research27.1%Programming language27.1%Quantum mechanics26.5%Mathematical economics26%Chemistry26%Sociology23.5%Mathematical optimization21.9%Geography21.7%Medicine20.1%

Primary Research Areas

Mathematics Interdisciplinary Applications

NLM PubMed Catalog SCImago Profile

0 calls

Special Issues

Calls for Papers

No active Calls for Papers found for this journal.

Expand

WoS Categories & Quartiles

Detailed JCR / JCI category rankings and quartile breakdown from Clarivate

Clarivate JCR & JCI

JCRSCIE2026

MATHEMATICS, INTERDISCIPLINARY APPLICATIONS

Rank10/137

IndexSCIE

JCISCIE2026

MATHEMATICS, INTERDISCIPLINARY APPLICATIONS

Rank13/137

IndexSCIE

Category	Index	Rank	Quartile
MATHEMATICS, INTERDISCIPLINARY APPLICATIONS	JCRSCIE	10/137	Q1
MATHEMATICS, INTERDISCIPLINARY APPLICATIONS	JCISCIE	13/137	Q1

Annual Historical Statistics & Publications

Track annual publication volume, total citations, and Impact Factor evolution

12 year

2026Latest

IF4.6

Articles / Year29

Total Citations15

2025

IF4.4

Articles / Year50

Total Citations170

2024

IF3.2

Articles / Year29

Total Citations196

2023

IF2.9

Articles / Year43

Total Citations491

2022

IF2.188

Articles / Year27

Total Citations413

Year	Impact Factor	Articles / Year	Total Citations
2026	4.6	29	15
2025	4.4	50	170
2024	3.2	29	196
2023	2.9	43	491
2022	2.188	27	413
2021	3.321	35	397
2020	2.268	70	1,121
2019	—	36	564
2018	—	36	603
2017	—	46	672
2016	—	34	464
2015	—	31	419

SCImago & Scopus Journal Intelligence

Global SCImago ranking, SJR prestige index, Scopus coverage, and societal policy impact

Rank #10,666Scopus Q2SCImago Profile

Scopus Coverage:2011-2026

•

Scopus Broad Areas:Computer ScienceEngineeringMathematics

Scopus Citation Rank (SJR)Q2

0.556

Weighted prestige citation metric per document indexed in the Scopus database.

Quartile: Scopus Q2

Citations / Doc (2 years)

3.57

Average citations received per document published in the 2-year window.

2-Year Citation Window

Estimated Publication Fee (APC)

$2,992 USD

Estimated Article Processing Charge for Open Access publication.

Estimated cost / article

Scopus 3-Year Publication & Citation Window

3-Year Citations444

3-Year Documents124

Citable Documents121

Aggregated from Scopus database across the 3-year SJR evaluation window.

Societal Impact & Inclusivity (SCImago)

Policy Citations (Overton)0

Citations in government and international policy documents

Female Author Rate39.9%

Percentage of female authors published in the journal

Real-world societal policy reach and author gender diversity tracked by SCImago.

Scopus Subject Categories

Applied MathematicsQ2

Computer Science (miscellaneous)Q2

Control and Systems EngineeringQ2

Academic Metric Intelligence

Journal Metrics & Citation Visualizations

Total Cites vs Self-Cites

Evaluation of scholarly independence and citation reach

Total citations steady growth

Self-citation: 34.4%

Citations per Document

Citation metric windows across 2, 3, and 4 years

Cites / Doc (4 years)Cites / Doc (3 years)Cites / Doc (2 years)

Chinese Academy of Sciences (CAS) Classification

Major / minor zone classification and CAS Early Warning List history

Major Category (Broad Field):

2区 (Zone 2)Engineering & Technology

Minor Category (Specific Field):

2区MATHEMATICS, INTERDISCIPLINARY APPLICATIONS

CAS Early Warning List History:

Updated annually: 2020 – 2024

2020

Not warned

2021

Not warned

2022

Not warned

2023

Not warned

2024

Not warned

Academic Intelligence Overview & Context

ImpaQ Analysis

The journal enforces rigorous peer evaluation with an annual output of approximately 35 scientific articles. In terms of accessibility and author fees, it operates under the Subscription model with an estimated APC of $2,992 USD. It serves as a benchmark publication platform for academics, researchers, and doctoral candidates seeking global research visibility.