In inventory application, Reorder tab:
1. Primary Vendor is an text field
2. Default Vendor is a check box in Vendors section to select one vendor as default.
above mentioned both type are separate in Maximo although they seems identical.
1. Maximo will take the precedence to the Vender entered in Primary Vendor while reordering, (its a process to manually select any vendor for the item ). If and only if the primary vendor is not entered, then it will take default vendor from vendors list attached to this item. Primary vendor is identifier of the primary vendor for the item.
You will notice that whenever you select any company in primary vendor field and Maximo generates a new row in vendors section in bottom of Reorder Details tab.
2. Default vendor check box in Vendors Section, you may enable only one default vendor in inventory/reorder details/vendors section but you can add/attach as much vendor as you can with the one item. If the check box is selected, this will be the default vendor used on Work Order Planned Materials and Services lines for direct issue requisitioning.
reference: https://www-01.ibm.com/support/docview.wss?uid=swg21470910
reference: https://www-01.ibm.com/support/docview.wss?uid=swg21470910