A supply-chain network (SCN) is an evolution of the basic supply chain. Due to rapid technological advancement, organizations with a basic supply chain can develop this chain into a more complex structure involving a higher level of interdependence and connectivity between more organizations, this constitutes a supply-chain network.
A supply-chain network can be used to highlight interactions between organizations as well as to show the flow of information and materials across organizations. Supply-chain networks are now more global than ever and are typically structured with five key areas: external suppliers, production centers, distribution centers (DCs), demand zones, and transportation assets.
An entrepôt (English: /ˈɒntrəpoʊ/ON-trə-poh; French:[ɑ̃tʁəpo]) is a transshipment port, city, or trading post where merchandise may be imported, stored, or traded, usually to be exported again. Entrepôt also means 'warehouse' in modern French, and is derived from the Latin roots inter 'between' + positum 'position', literally 'that which is placed between'. Typically located on a crossroads, river, canal, or maritime trade route these trade hubs played a critical role in trade during the age of sail. Modern logistics, supply chain networks, and border controls have largely made entrepôts obsolete, or reduced them in number, but the term is still used to refer to duty-free ports or those with a high volume of re-export trade.
Railways, Container Ships, Air-Freight, and Telecommunications have created a world in which commodities and manufactured goods are shifted from one part of the globe to another in regular, controlled, and reliable streams; see Just-in-Time Manufacturing. Eliminating the factors which once made the entrepot phenomenon central to trade networks. But, as pointed out by the Dutch economist T.P. van der Kooy and has been more recently restated by P.W. Klein, before the Industrial Revolution the flow of goods from one part of the world to another, even one region of a country to another, was so irregular and unpredictable that there was no possibility of achieving any sort of steady distribution, any balancing of supply and demand, or any sort of price stability except by stockpiling great reserves of commodities in central storehouses; ie entrepots.
