Table 8. Coefficient estimates demonstrating the response change per unit change in factor value when the remaining factors remain constant. The intercept is the average response of the runs while Table 8. Coefficient estimates demonstrating the response change per unit change in factor value the coefficients are normalized by the average. For orthogonal factors the VIFs are 1; VIFs > 1 are when the remaining factors remain constant. The intercept is the average response of the runs while indication of multicollinearity. the coefficients are normalized by the average. For orthogonal factors the VIFs are 1; VIFs > 1 are indication of multicollinearity.