Supply Chain Blind Spots: Why You Must Map the Value Chain Before You Commit

Picture this: you're in a quarterly review, and the VP of strategy leans in: "Should we invest in that new supplier in Vietnam?" You've run the Porter's Five Forces, the PESTLE looks clean, and the CAGR is glowing. But then someone mutters, "What if they get hit by a typhoon?" That's when you realize you've been looking at the industry from 30,000 feet. You need a ground-level map of the supply chain.

This article is for analysts, strategists, and investors who want to move beyond the macro picture and actually see where value is created and captured. We're going to walk through a practical, six-step process to map your industry's supply chain, using the value chain framework and concentration metrics to spot the vulnerabilities that most forecasts miss. The single best move: before you trust any industry analysis, trace the physical and financial flow from raw materials to end customer, and then stress-test the chokepoints.

Who This Is For

If you write industry reports, evaluate M&A targets, or build five-year plans, this is for you. You already know the frameworks—Porter's Five Forces, PESTLE, SWOT—but you've probably used them as checklists rather than as a lens on the actual flow of goods and money. We're going to change that.

Step 1: Define the Industry and the Relevant Market

Start by defining the industry. Analysts define the industry, survey total sales and growth, and distinguish the total market from the strategically relevant market (SRM) (CFA Institute). The SRM is the slice you actually compete in—geographically, product-wise, customer-wise. For a supply chain analysis, this matters because your chokepoints will live in the SRM, not the whole market.

For example, if you're analyzing the global market research industry, the total market was estimated at over $140 billion in 2023 (ESOMAR via Research World). But if you're focused on full-service research in Asia Pacific, that's a different SRM, with its own growth dynamics—the region grew about 9.5% in 2023 versus 8.0% globally (ESOMAR via Research World (Asia Pacific)).

Step 2: Map the Value Chain

Now, get granular. Michael Porter introduced the value chain in his 1985 book, and it's still the best way to break a firm's activities into primary categories—inbound logistics, operations, outbound logistics, marketing and sales, and service—plus support activities like procurement and technology (IBM Think). But we're not mapping one firm; we're mapping the industry's supply chain. You need to identify each stage from raw materials to end user, and who the key players are at each stage.

For a physical product, this could be: raw material extraction → component manufacturing → assembly → distribution → retail. For a service, it's the flow of data or expertise. The goal is to see where the bottlenecks are—where a single supplier or a single customer has outsized power.

Step 3: Assess Supplier and Buyer Power

This is where Porter's Five Forces becomes your friend. The stronger the five forces, the lower the industry's profit potential (CFA Institute). Specifically, supplier power and buyer power can drain away the economic value an industry creates (Harvard Business School). Ask: How many suppliers exist at each stage? How many buyers? If there's one dominant supplier of a critical component, they can squeeze everyone downstream.

For example, in the insights industry, the research software sector grew 12.4% in 2023, while the more mature market research sector grew only 4.6% (ESOMAR via Research World). That tells you where the power is shifting—software vendors are gaining leverage over traditional research firms. If you're analyzing a research firm, you need to map its dependence on software licenses.

Step 4: Quantify Market Concentration

Now, put numbers on it. The Herfindahl-Hirschman Index (HHI) is the sum of the squares of market shares, ranging from near zero to 10,000 in a monopoly (US DOJ Antitrust Division). Under the 2023 Merger Guidelines, a market is moderately concentrated when HHI is between 1,000 and 1,800, and highly concentrated above 1,800 (US DOJ Antitrust Division).

Calculate the HHI for each stage of your value chain. If a stage has an HHI above 1,800, that's a red flag—you're dependent on a few players. For instance, if the US holds about 53% of the global market research market (Similarweb / Research and Markets), that's a concentrated buyer side. But you need to go deeper: what's the HHI for the top three suppliers of your key input?

Here's a concrete example: Suppose you're analyzing the market for consumer goods research. Pharmaceutical companies account for about 16.6%, media and entertainment 15.5%, and consumer goods producers 14.9% of spending (Similarweb / Research and Markets). That's a relatively fragmented buyer base, but if you're a niche research firm serving only pharma, your SRM's HHI might be much higher.

Step 5: Stress-Test with PESTLE and Scenarios

Now, bring in the macro. PESTLE analysis covers political, economic, social, technological, legal, and environmental factors (CFA Institute). But don't just list them—use them to stress-test your supply chain. For example, environmental factors have grown in importance due to scarcity of raw materials and carbon footprint goals (Washington State University Libraries). If your supply chain depends on a material that's becoming scarce, that's a future chokepoint.

Political factors, like trade policies and regulation, can shift overnight (Washington State University Libraries). Economic factors, like inflation and interest rates, affect demand (Washington State University Libraries). Run a scenario: What if a tariff is imposed on a key import? What if a drought hits a raw material region? The CFA Institute recommends using both Porter's Five Forces and PESTLE together (CFA Institute). We're doing that, but with a supply chain twist.

Step 6: Identify Key Success Factors and Act

Finally, distill what it takes to win in this industry. The value chain analysis supports two main types of competitive advantage: cost leadership and differentiation (IBM Think). Cost leadership means being the low-cost producer through economies of scale, proprietary tech, or preferred supplier access (IBM Think). Differentiation means creating unique products that command a premium (IBM Think).

Once you know the chokepoints and the concentration, you can decide where to play. If a critical input is highly concentrated, you might need to vertically integrate or sign long-term contracts. If the buyer side is concentrated, you might need to differentiate to avoid price wars.

What can go wrong: You might over-rely on a single framework. If you only look at Porter's Five Forces, you might miss the environmental risk. If you only look at PESTLE, you might miss the supplier power. The biggest failure is treating this as a one-time exercise. Markets shift, and so do supply chains. Revisit your map annually.

Bottom Line

The single best move is to map the value chain of your specific market, calculate the HHI for each stage, and stress-test with PESTLE scenarios before you commit to any forecast or investment. That's how you see the chokepoints that others miss.

Sources

• CFA Institute - https://www.cfainstitute.org/insights/professional-learning/refresher-readings/2026/industry-and-competitive-analysis
• Harvard Business School - https://www.hbs.edu/faculty/Pages/item.aspx?lang=en&num=34522
• IBM Think - https://www.ibm.com/think/topics/value-chain-analysis
• US DOJ Antitrust Division - https://www.justice.gov/atr/herfindahl-hirschman-index
• ESOMAR via Research World - https://researchworld.com/articles/drivers-of-our-142bn-insights-industry
• Similarweb / Research and Markets - https://www.similarweb.com/blog/research/market-research/market-research-stats/