Figure 7
The vertical axis lists the keywords. The horizontal axis ranges from 0 to 40 in increments of 5 units. The data is as follows: The two most frequent keywords are “Sustainability” with 35 occurrences and “Lean Manufacturing” with 24 occurrences. Following these are “Lean” (13), “Lean Practices” (11), and “Value Stream Mapping” (10). The remaining keywords, with 7 or fewer occurrences, include “Sustainable Performance” (7), “Lean Production” (7), “Lean Construction” (6), “Lean Tools” (6), “Environmental Sustainability” (5), “Productivity” (5), “Green” (5), “Operational Performance” (4), “Industry 4.0” (4), “Lean Six Sigma” (4), “Sustainable Development” (4), “Supply Chain Management” (4), “Supply Chain” (3), “5 S” (3), and “Lean Management” (3).Top 20 most used keywords. Source: Authors’ own work