Concepts, Characteristics and models of b2b ec ypes of Materials Traded direct materials Materials used in the production of a product ( e.g steel in a car or paper in a book) indirect materials Materials used to support production(e.g, office supplies or light bulbs) MRo (maintenance, repair, and operation) Indirect materials used in activities that support production Electronic Commerc Prentice Hall 2006Electronic Commerce Prentice Hall © 2006 11 Concepts, Characteristics, and Models of B2B EC – Types of Materials Traded direct materials Materials used in the production of a product (e.g., steel in a car or paper in a book) indirect materials Materials used to support production (e.g., office supplies or light bulbs) MRO (maintenance, repair, and operation) Indirect materials used in activities that support production