$$ \text{EDI} = \frac{\max\left(0, \text{NORM.INV}(\text{RAND()}, \bar{C}, \sigma_c)\right) \times \text{NORM.INV}(\text{RAND()}, \bar{K}, \sigma_k) \times EF \times ED}{\text{NORM.INV}(\text{RAND()}, BW, \sigma_{BW}) \times \text{Lifetime Days}} $$