The coating rating for any specimen is determined by:Coating Rating=2mgh , unit = J or kg.m2/s2Where,m is the drop mass (kg)g is the gravitational constant (m/s2)h is the drop height (m)The drop testing as described above is to be summarized in a chart as shown in Figure 5 below.A statistically significant amount of data points must be provided to establish the trend line. The amount of data points and the definition of the trend line requires acceptance from Ford Chassis Engineering.