Supply Chain Following

Tracing products back through their supply chains to find related quality businesses worth evaluating.

From Product to Supply Chain

Every product you use is the visible tip of a deep supply chain. Tracing that chain backward — asking "who made this possible?" at each step — reveals businesses that may be even more impressive than the final product.

The consumer's edge is not just about the product you hold. It is about the trail of questions the product opens up.

The Method in Practice

Example: iPhone to Lithography

Starting from a single product and following each link upstream:

1. iPhone — Apple designs custom chips for performance and efficiency
2. Apple's custom chips — designed by Apple, but manufactured by TSMC
3. TSMC — the world's leading foundry, but depends on specialized equipment
4. ASML — makes the only extreme ultraviolet lithography machines on Earth

Each link in this chain represents a business you can evaluate on its own merits. Some of the most irreplaceable companies in the world sit in the middle of supply chains, invisible to the end consumer.

Example: Amazon Delivery

• Fast Amazon delivery — requires massive logistics infrastructure
• Fulfillment centers, routing algorithms, last-mile networks — each is a competitive advantage built over decades
• The speed you experience as a customer reflects billions in capital expenditure and operational refinement

Example: Tesla Software Updates

• Over-the-air updates — possible because Tesla controls the full software stack
• Vertical integration — Tesla builds components most automakers outsource
• The update you receive reflects a fundamentally different manufacturing philosophy

When a product impresses you, ask: "Who made the component that makes this possible?" Then ask it again for that component. Two or three steps back often leads to a business with a stronger moat than the one you started with.

Building a Research Map

Supply chain following naturally generates a map of interconnected businesses. Over time, the same names appear again and again at critical nodes — these recurring dependencies are often the most important companies to understand.

When multiple supply chains converge on the same company, that convergence is itself a signal of importance. TSMC appears whether you start from an iPhone, a data center GPU, or an automotive chip.

Related

• The Consumer's Edge — the starting point for supply chain research
• Irreplaceability — the strongest companies found through supply chain tracing are often the only ones that can do what they do
• Alignment of Interests — evaluate the structural relationships between supply chain partners