Value chain
A value chain is the full set of activities a company performs to create and deliver a product, viewed through the lens of where value and margin are added: design, inbound materials, production, marketing, distribution, and after-sale service. Where a supply chain maps the flow of goods, the value chain maps which activities customers actually pay for.
Examples
Margin mapping: A bicycle brand maps its chain and finds frame fabrication adds $90 of cost but little differentiation, while paint quality, assembly tolerance, and fit drive most of its price premium. It moves frames to a contract fabricator and keeps finishing in-house.
Where value concentrates: On a $1,200 e-bike, teardown analysis attributes roughly $310 of cost to the drive system and battery and $95 to final assembly. The brand puts its engineering effort into the drive-system spec, not into squeezing assembly labor.
Service as a value activity: An industrial pump maker earns 38% gross margin on equipment and 55% on spare parts and service contracts. The value chain view pushed it to treat service as a product line rather than a cost center.
Definition
Michael Porter introduced the value chain in 1985 to answer a competitive question: of everything a firm does, which activities create value customers will pay for, and which just create cost? He split activities into primary (inbound logistics, operations, outbound logistics, marketing and sales, service) and support (procurement, technology, HR, infrastructure).
The distinction from supply chain management is the lens. The supply chain view asks how goods, information, and money flow; the value chain view asks where margin is earned. The same factory looks different through each: a supply chain analyst sees throughput and lead time, a value chain analyst asks whether in-house assembly adds enough value to justify keeping it.
That makes the value chain the natural frame for the make-or-buy decision and for outsourcing choices. Activities where you have no advantage are candidates to buy; activities that drive willingness to pay deserve investment. The analysis only works with honest cost allocation, which is why it pairs well with total cost of ownership thinking rather than unit-price comparisons.
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