a2f28abd_Marketing__3
[0] Component materials and parts. [1] Processed goods that become a portion of a final product. [2] High volume purchases, long-term contracts; fierce competition among suppliers, requires good service and nurturing of relationships with buyers. [3] 
Manufacturers buy most components materials and parts in large quantities, usually sold direct, without use of middlemen. Wholesale distributors sell to smaller manufactures in some lines of trade. To avoid disrupting production runs, sellers must ensure a steady reliable supply of materials and parts, JIT
Marketing
3