Vendor Evaluation

Hi,

1. I have created 1st PO with price 94 and checked the ME63, system showed score for price level as 40. Then I made another PO with price 80 and checked ME63, system displayed the same score 40,

again I created new PO with the price 40, the also system is showing score 40. While there is change in price more than 5 %, so I was expecting score as 50.

2. How I can maintain vendor evaluation ME61 for all vendors at same time?? in single go.

Can anyone explain about this.

Nilesh