Hello All:
In my opinion, the link that Howtse provided is the best source of information in understanding 7.4.1.2 of TS 16949.
(broken link removed)
The link gives you the text from TS 16949:2002 and the TS 16949 Guidance document. The link also leads you to definitions of "supplier" and "manufacturing." With the defintions of both of these words, one can formulate a plan to meet the requirements of 7.4.1.2. Defining "supplier" and "manufacturing" will allow one to determine which suppliers must be ISO 9001:2000 certified.
Manufacturing: the process of making or fabricating production materials, production or service parts, assemblies, or heat treating, welding, painting, plating, or other finishing services.
Regards, Dirk