Fine classing and coarse classing?

r
bivariateanalysis
faultpredicition

#1

Can anybody please explain what is Fine classing and coarse classing?
and how this is related to
• Weight of evidence (WOE)
• Information Value (IV)
• Gini Coefficient
• Chi square value
• KS value

have to performe Bivariate Analysis on categorical data.
Thanks In Advance!!!