Ok, I am clueless as well. For some reason I am a total blank on this

I see that I was confused between the 2 systems, so I will now ask about the risk method.
I was off topic

Let me try to make sense of this and hope that you bear with me.
The table on P127 has a column Ref Value which according to P128 were not initially determined.
I cannot see any way in which the Ref value is calculated and what use it is please show me the light
