Calculating actual weightings

When you do a full update of the vendor ratings in the Update Vendor Rating (tdpur8850m000) session, the calculation of actual weightings is the first stage in the calculate/update vendor rating procedure.

When you rescale the criteria weightings in the Normalize Criteria Weightings (tdpur8852m000) session, you can choose to:

• Fully update the weightings
• Recalculate the weighting for one subjective criterion

After the rescale, the weightings represent a true percentage. So, weightings are not changed relative to other weightings.

Full update

When you recalculate all criteria weightings, the calculation is as follows:

1. Summing the weightings

   The weightings for all the objective criteria and the level 0 subjective criteria are summed.

2. Recalculating objective and level zero subjective criteria

   The following recalculation takes place for the objective criteria and level zero subjective criteria:

   New weighting = (existing weighting/objective weightings and level zero subjective weightings) * 100 

3. Calculating subjective weightings with level one or higher

   The subjective weightings with level one or higher are calculated in the same way as the recalculation of one criterion, which is stated below.

Recalculation for one subjective criterion

When you recalculate the weightings for one criterion, the calculation is as follows:

New weighting = (current weighting/sum of all weightings) * 100 

If the selected subjective criterion has level one or higher, the following applies:

Sum of all weightings = sum of all the weightings whose parent is the selected subjective criterion.