The sensitivity analysis was implemented on the "6 MD" KMC model with the rate coefficients extrapolated to 4,000 K. At this temperature, the reaction rate coefficient of one reaction at a time was either multiplied or divided by 10 and 20 KMC simulations were run with this modified rate, leaving the other rates unchanged. The obtained the trajectories was then compared with the average of the trajectories obtained in the case none of the reactions rates were modified. To measure how these trajectories were different depending on the reaction rate coefficient that was modified, a "sensitivity score" S j of the reaction j was defined as