Industry Structure: Porter & Value Chains

Learning objectives

You will be able to:

1. State fairly what the evidence says about how much industry structure explains. The variance-decomposition findings (Schmalensee, Rumelt, McGahan & Porter), the persistent spread in industry-level ROIC, and the correct analyst conclusion: firm effects are larger, but industry is the strongest ex ante base rate and sets the distribution a firm draws from.
2. Run each of the Five Forces as a question, not a checklist item. For rivalry, entry threat, substitutes, buyer power and supplier power, name the structural determinants that drive it and the specific filing and dataset evidence (segment notes, ≥10%-customer disclosures, DSO/DPO trends, gross-margin pass-through, capacity and share tables, risk-factor language) an analyst uses to score it 1–5.
3. Compute and interpret concentration measures, CR4 and HHI (with the DOJ/FTC thresholds), and explain why concentration is an input to a rivalry judgment, never the verdict itself, and why the relevant market (route vs national, regional vs national, segment vs sector) changes the number.
4. Run a complete five-forces analysis end-to-end on a real industry, producing a scored scorecard, a verdict on expected industry ROIC vs WACC, the binding force, and the structural watch items, as demonstrated on Indian decorative paints and US airlines with the profit-pool numbers that make the contrast concrete.
5. Classify a firm's competitive posture into Porter's three generic strategies (cost leadership, differentiation, focus), diagnose "stuck in the middle" from margin and share data, and state honestly where the framework's trade-off claim holds and where dual advantages have genuinely existed.
6. Draw Porter's value chain (five primary, four support activities) for any business and use it two ways: to locate where cost and willingness-to-pay are actually created, and to compare two rivals' chains activity by activity.
7. Map a profit pool across a full supplier→firm→customer chain. Estimate each link's revenue and operating margin from pure-play filings, compute each link's share of chain profit, explain why the pool sits where it sits (the forces, run per link), and say which way it is migrating, as demonstrated on the smartphone chain.
8. Define the industry correctly before analyzing it. Apply demand-side and supply-side substitution tests, avoid the too-broad and too-narrow traps, and use the "run it twice" discipline when the boundary is genuinely uncertain.

Prerequisites & connections

Builds on. M4.01: the value chain from input to cash (section 4.2 there) was drawn for one company, and the work here industrializes it, drawing the same chain across every participant, with a margin attached to each seat. M4.02: contribution margins and operating leverage return as structural facts about whole industries (an industry of high-fixed-cost firms selling a commodity behaves differently from an industry of variable-cost firms selling differentiated goods). M2.01–M2.03: margins, DuPont, and the blank-sheet ROIC build. Every force score you write is ultimately a claim about someone's ROIC, and you will keep checking claims against computed returns. M2.05: benchmarking discipline, since cross-sectional comparison against the right peer set is exactly the industry-definition problem, formalized. M3.03: the WACC hurdle (~12% INR for India, ~8–9% USD for the US, illustrative as of mid-2026, verify against your own builds) is the line every industry verdict is measured against. M3.05: reverse-DCF thinking reappears as "what industry structure is this multiple assuming will persist?"

Feeds forward. M4.04–M4.05 are the firm-level sequel: once you can say this industry's average member earns X, the moat question becomes why does this particular member earn more, and what protects that? Greenwald's move, collapsing the five forces into the single question of entry barriers, lands in M4.05 and will feel inevitable by then. M4.06 adds dynamics: the capital cycle is what happens to your force scores when an investment boom hits. Phase 5's seventeen sector playbooks are this same apparatus run with sector-specific instruments, and the airline structural anatomy you build here becomes the foundation under the Phase 5 airline playbook's RASK/CASK tooling. Phase 8's teardown question 5 and the Day-2 industry map of the deep dive are this work under a stopwatch. Competency C4 (assess competitive advantage) and C3 (business model cold) both draw on the gate skill certified here.