Prob & Impact Matrix

Hi all,
I'm using the Head First book and am reading the Project Risk Managemt KA. The P&I matrix seems to me to be an arbitrary tool. You're using the Qualitative Risk Analsis process and you're arbitraritly assigning a number (not calc'd out) to each risk and the categories.
Am I missing something here?
Thx


Yes by definition
Yes by definition qualitative analysis is not based on any data or facts. It will rely on other factors like experience , analogy etc.
P&I
Thanks admin. I thought it was a little too easy and subjective to create a matrix. I looked in my Mulcahy book and kind of confirmed what you said.