Further Analysis Options (PURCHIS, Evaln. Sheet) 
You can obtain further information that is useful in the appraisal of the vendors who supply you with materials from the vendor evaluation sheet and by making use of the standard analyses within the Purchasing Information System (PURCHIS).

In the PURCHIS, you will also find the standard analysis for vendor evaluation. This is not described here, but in the section
When you run standard analyses for a vendor, a material group, or a material, and for long-term planning with regard to vendors and material groups, the list will include key figures for the delivery quantity variance and date variance (among other things). The extent of the variances is determined via a grid containing certain windows. The windows are defined within the Purchasing Customizing facility for each purchasing organization. The key figures are updated following each goods receipt according to the relevant window.
This means that you can see how the deliveries are distributed among the individual windows, and find out how many deliveries were received too late or too early, or whether too much or too little was delivered.

The following windows have been defined for delivery quantity variances in Customizing:
-n to -20
-19 to -10
-9 to 10
11 to 20
21 to n
A goods receipt in which, for example 24% too little material was delivered falls within window 1, whereas a GR in which 8% too much material was delivered falls within window 3.
Viewing Key Figures in PURCHIS
You will obtain a list of results.
In the dialog box that now appears, you will see - among other things - the key figures for delivery date variance and quantity variance.
Viewing Key Figures in the Vendor Evaluation Sheet
The windows are also displayed in the vendor evaluation sheet. From the Purchasing menu, choose Master data
® Vendor evaluation ® Follow-on functions ® Print evaluation sheet. A prerequisite is that an appropriate scope-of-list parameter has previously been maintained in Customizing.