| Step | Activity |
| Ranking indicators within articles | The observed indicators were ranked starting with 1, for the least important one to the given maximum level in the article. |
| Re-scaling the previous ranking | The ranked indicators were re-scaled from 1, for the least important indicator within the article to 3 for more important indicator within the article based on Equation (1). |
| Strengthening indicators by using arbitrary factor based on the number of indicators considered within the paper. | A factor of 1 was given for the minimum 2 indicators and 3 to the maximum number of 16 indicators that was presented across all papers based on Equation (2). |
| Scoring within a paper | Equation (3) |
| Scoring for individual indicators | The final score (fs) for individual indicators was obtained as a sum across all papers |