Finding CPW for iseries

One of my customer asked to verify the details about the iseries system
model 890 . Everything else like Alternate IPL device , memory and other
items did not trouble me except the CPW values. I want to know how can i
find the CPW Processor value for my existing machine.

I did some googling but could not find any link which can tell me that .
Using server feature code and processor feature code and model i can find
the min and max value that can be supported by the particular model but the
current value is less and i am not getting a clue from system to find it .

Is it that it can only be determined while the Sizing was done and not
afterward ?

Rhishabh