This page is only a technical page, so the correct navigation can be displayed on the Purchasing Process wiki page.
A productive system will contain a large number of vendors and outline purchase agreements representing external sources of supply (external procurement), as well as plants belonging to your firm representing internal sources of supply (internal procurement).
The source determination facility helps you to find the most suitable source for a certain requirement from the large volume of data that is available, i.e. it suggests a suitable outline agreement or vendor for ordering purposes.
Below you will find more information about Source of Supply in Purchasing area: