How robust is the MFBO performance to different initialization schemes? We conducted 100 MFBO and SFBO searches whose surrogate model is initialized with training data from simulations in three COFs: the first randomly selected (as opposed to the COF nearest the center), the next two chosen via max-min distance for diversity. Fig. shows the distribution of accumulated of the additional low-fidelity simulations. We include the runtime incurred for initialization.