  The high cooling rate needed for preparing the metallic glass (MG) makes the
nonequilibrium nature of glass formation more prominent and requires a better
quenching technique than ever before. Here, we formulate the cooling process in
an analytical way and figure out the determinants for cooling rate, and analyze
the crystallization time with consideration of phase diagram. Based on the
reduced glass transition temperature, Trg, for measuring the glass-forming
ability (GFA), a more reasonable {\Delta}Trg is proposed. Glass transition,
especially in ever glass whose ground state is of glass, is discussed in terms
of thermodynamics for phase transition. A fundamental law concerning the
changing rate of entropy in a closed system is supposed to underlie the physics
for glass formation. These results may help understand the glass formation
principally and develop new and robust MGs technically.
