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The search query process.
| Phase | Process | Selection Criteria | IEEE | Scopus | Willey | Google Scholar | Sprinkle | ACM (Association for Computing Machinery) | Science Direct | Total |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Searching | Keywords | 20 | 3 | 3 | 26 | 7 | 4 | 12 | 75 |
| 2 | Searching | Title | 20 | 3 | 2 | 20 | 7 | 4 | 7 | 63 |
| 4 | Further Screening | Introduction and Conclusion | 20 | 3 | 2 | 20 | 6 | 4 | 7 | 62 |
| 5 | Evolution | Complete Articles | 20 | 3 | 2 | 20 | 6 | 3 | 6 | 60 |
