Vendor Evaluation implementation

Question

Dear Buddies
This has reference to the subject matter, we needs to implement the Vendor Evaluation in SAP, being an Audit Requirement.
We needs to fix the following parameters for the same:
"QUOTE"
CRITERIA FOR VENDOR RATING
                    W1xQr + W2xDr + W3xSr + W4xAr
Vendor Rating (VRML) =     -
                              100
     Where      Rating          Weightage          To be rated by
     Quality (Qr)          W1 = 50          Unit Mat Deptt/ Stores
     Delivery (Dr)          W2 = 30          Unit Mat Deptt/Stores
     Service (Sr)          W3 = 10          Purchase Department
     Adaptability (Ar)          W4 = 10          Purchase Department
     1)      QUALITY RATING (Qr)      =     (Q1 + Q2 x 0.8 + Q3 x 0.5 + Q4 x 0)
                                             Q
          Where   Q =      Q1 + Q2 + Q3 + Q4
               Q1 =     Quantity Accepted
               Q2 =     Quantity accepted with Deviation (Demerit Factor = 0.8)
               Q3 =     Quantity accepted after rework (Demerit Factor = 0.5)
               Q4 =     Quantity Rejected
     2)     DELIVERY RATING (Dr)      =      Q1 x 100
                                         Q
          Where   Q =      Total consignments delivered
                          Q1 =     Consignments delivered in Time
3)     SERVICE RATING (Sr)      
           To be given on a scale of 1 to 10 (10 being the Very Good Service, 
           Response Time, both Pre- Sales and After-Sales. e.g. 7 point = 70%).
4)     ADAPTABILITY TO CHANGES & IMPROVEMENT (Ar)      
           To be given on a scale of 1 to 10 (10 being the Proactive in Improving the      Product &   Service, Very much Adaptable to Changes. e.g. 7 point = 70%).
VENDOR RATING GRADES
          A     100 u2013 80 %
          B     79 u2013 70 %
          C     69 u2013 60 %
          D     < 60 %
I just aware where we can do the configurations. But not understanding how to put the scores, weight ?

Answer 1

Dear Friends
Can you explain how to calculate this things thro VE implementation ? Where i can mention in configurations to calculate the these ratings?
QUALITY RATING (Qr)      =     (Q1 + Q2 x 0.8 + Q3 x 0.5 + Q4 x 0)/ Q
Where   Q =      Q1 + Q2 + Q3 + Q4
               Q1 =     Quantity Accepted
               Q2 =     Quantity accepted with Deviation (Demerit Factor = 0.8)
               Q3 =     Quantity accepted after rework (Demerit Factor = 0.5)
               Q4 =     Quantity Rejected
DELIVERY RATING (Dr)      =      Q1 x 100 /    Q
          Where   Q =      Total consignments delivered
                          Q1 =     Consignments delivered in Time
There after only I can do the these ratings weighing %. Please help me out