how multiple rates get determined in dynamic rate determination for the same rate category and rate type

Hi Expert,

I am afraid

Since only one rate can be determine for a rate category and  rate type then how multiple rates get determined  in dynamic rate determination for the same rate category and rate type,  I know that if rates have the different time slices then its possible but what if same time slice for all determined rate.

I will be grateful if someone can explain it with example.

Thanks

Veer