Editing Value chain (section)

==Industry-level==
{{Unreferenced section|date=June 2023}}
An industry value-chain is a physical representation of the various processes involved in producing goods (and services), starting with raw materials and ending with the delivered product (also known as the [[supply chain]]). It is based on the notion of value-added at the link (read: stage of production) level. The sum total of link-level value-added yields total value. The French Physiocrats' ''[[Tableau économique]]'' is one of the earliest examples of a value chain. [[Wassily Leontief]]'s input-output tables, published in the 1950s, provide estimates of the relative importance of each individual link in industry-level value-chains for the U.S. economy.