You maintain the non-vendor-specific planned delivery time in the material master (view "MRP 2"). You enter a vendor-specific planned delivery time in the purchasing info record or in the outline agreement. It is used in the planning run, if the indicator "Scheduling info record/agreement" in Customizing is maintained as a plant parameter (OPPQ) or MRP group parameter in 'external procurement' and if, in the area of automatic source determination, an individual vendor can be assigned.
If you set this indicator, the system checks whether a planned delivery time is pentered in the purchasing info record or in the outline agreement. This planned delivery time is then used to calculate the delivery date and the release date.
In my understanding a vendor can supply more than one material and infact there is no meaning
maintaining the planned delivery time in the vendor master in XK01.Because this value is not going to
remain same for all the materials which the vendor supplies.
So in my understanding the value in purchase info record has more priority than in the material master.
Check and revert back.