Each factory has two major lines of administration, one headed by the manager, the other by the party committee secretary. A chief engineer and his or her assistants direct a general staff in charge of all aspects of production, planning, and technical guidance. Depending on the size of the factory, varying numbers of deputies oversee factory logistics, marketing, and workers' services. The supply of materials includes securing, storing, and distributing all materials for factory use, as well as storing finished products and shipping them from the factory.