Figure 4
The figure is a circular network map with multiple nodes, each labeled with a keyword and connected by thin colored lines. In the center, the largest node is “sustainability” (blue-green), which connects outward to “environmental studies” (green), “decision making” (yellow), “performance evaluation” (tan), “balanced scorecard,” “sustainability reporting,” and “supply chains.” Nearby, smaller nodes labeled “indicators,” “sustainable indicators,” “natural resources,” and “social factors” cluster with multiple colored linkages. On the right, “manufacturing” and “small and medium-sized enterprises” connect mainly to “environmental studies” and “sustainability.” Each node is shown as a small circle with readable black labels, and all visible links and node placements reflect the concept network. On the bottom-left, a text reads with a logo: “V O S Viewer.” On the bottom-right, a horizontal color bar includes blue on the left, representing 2016, and yellow on the right, representing 2020.Outcomes of keywords co-occurrence analysis. Source: Authors' analysis using VOS viewer