Council of Logistics Management (1991) defined that logistics is ‘part of the supply chain   process that plans, implements, and controls the efficient, effective forward and reverse flow   and storage of goods, services, and related information between the point of origin and the   point of consumption in order to meet customers’ requirements’.   

Logistics describes the entire process of materials and products   moving into, through, and out of firm. Inbound logistics covers the movement of material   received from suppliers. Materials management describes the movement of materials and   components within a firm. Physical distribution refers to the movement of goods outward   from the end of the assembly line to the customer. Finally, supply-chain management is   somewhat larger than logistics, and it links logistics more directly with the user’s total   communications network and with the firm’s engineering staff.   

Components of Logistics System          
Logistics services comprise physical activities (e.g. transport, storage) as well as non-physical           activities (e.g. supply chain design, selection of contractors, freightage negotiations). Most           activities of logistics services are bi-direction. Information systems include modelling and           management of decision making, and more important issues are tracking and tracing. It           provides essential data and consultation in each step of the interaction among logistics           services and the target stations. Infrastructure comprises human resources, financial resources, packaging materials, warehouses, transport and communications. Most fixed capital is for building those infrastructures. They are concrete foundations and basements within logistics systems.