Table 1 Summary of methodology... | Emerald Publishing

Table 1

Summary of methodology

Systematic bibliometric analysis
Initial exploration	The first search for studies combining Industry 4.0, circular economy, and HRM yielded no results, underscoring a significant research gap
Pairwise analysis	Explored the intersections between pairs of topics: 589 papers on Industry 4.0 & circular economy, 104 on Industry 4.0 & HRM, and 43 on HRM & circular economy
Keyword strategy	Utilized variations of key terms and Boolean operators (e.g., AND, OR) to refine and expand search results
Inclusion parameters	Selected peer-reviewed journal articles, conference proceedings, and review papers relevant to the core themes of the research
Exclusion filters	Excluded non-peer-reviewed documents such as editorials, commentaries, duplicates, and unrelated papers
Screening workflow	Conducted a two-stage review: 1) Abstract review for initial relevance, and 2) Full-text review to ensure alignment with study goals
Data analysis focus	Performed bibliometric analysis to assess research productivity trends, authorship influence, and thematic development across topics
Advanced tools	Employed specialized software like Bibliometrix (R package) to perform detailed bibliometric calculations and statistical analysis

Systematic bibliometric analysis
Initial exploration	The first search for studies combining Industry 4.0, circular economy, and HRM yielded no results, underscoring a significant research gap
Pairwise analysis	Explored the intersections between pairs of topics: 589 papers on Industry 4.0 & circular economy, 104 on Industry 4.0 & HRM, and 43 on HRM & circular economy
Keyword strategy	Utilized variations of key terms and Boolean operators (e.g., AND, OR) to refine and expand search results
Inclusion parameters	Selected peer-reviewed journal articles, conference proceedings, and review papers relevant to the core themes of the research
Exclusion filters	Excluded non-peer-reviewed documents such as editorials, commentaries, duplicates, and unrelated papers
Screening workflow	Conducted a two-stage review: 1) Abstract review for initial relevance, and 2) Full-text review to ensure alignment with study goals
Data analysis focus	Performed bibliometric analysis to assess research productivity trends, authorship influence, and thematic development across topics
Advanced tools	Employed specialized software like Bibliometrix (R package) to perform detailed bibliometric calculations and statistical analysis

Source(s): Constructed by the authors