**Appendix B. The Equations of the Green BIM Index**

The suitability between the results of the actual implementation of BIM and the results of the optimal application of the BIM standard proposed by the study is expressed in the BIM application index, which can be presented in the equation (Equation (A1)):

$$\text{BMI Application Index (X)} = \frac{\text{The Actual Application of BMI}}{\text{Standard for Optical Application of BMI}} \tag{A1}$$

The comparison is applied in a number of formulas for examining the suitability in the various BIM standard parts:
