We start MOBO with some initial sample points set by a space-filling strategy. These initial points help to map the entire design space and provide initial information on the design space. In the following investigations, 20 initial sampling points were generated using Maximum Projection design, MaxPro , which is one type of Latin hypercube design that maximizes space-filling properties on projections with respect to all possible subsets of factors. Different numbers of initial sample points and sampling strategies were compared in Appendix C.