In plain English
Some industries make money for almost everyone in them; others punish everyone. Industry analysis asks which kind you are looking at, and why.
The advanced view
Structure–conduct–performance logic says that profitability is bounded by structural forces before firm skill matters. Five Forces maps who can capture value; PESTEL widens the frame to structural shifts; strategic group maps show where mobility barriers protect pockets of profit inside an otherwise brutal industry.
Porter's Five Forces is the workhorse for industry analysis: threat of new entrants, supplier power, buyer power, threat of substitutes, and rivalry. The output is not a score — it is a diagnosis of which forces constrain profitability and what a company can do about them. In technology-intensive industries, network effects and switching costs reshape the standard analysis.
PESTEL maps the macro environment (political, economic, social, technological, environmental, legal). It is context-setting, not conclusion-drawing: combine it with Five Forces for the full external picture. The industry life cycle — introduction, growth, maturity, decline — changes the playbook at each stage: growth strategy chases share, maturity strategy chases efficiency and positioning.
Frameworks
Porter's Five Forces
Industry profitability analysis. Diagnose which forces are strongest and build strategy to counteract them.
PESTEL
Macro-environment scan: political, economic, social, technological, environmental, legal drivers.
Strategic group mapping
Plot competitors on two strategic dimensions. Reveals direct rivals and mobility barriers between groups.
Industry life cycle
Stage of evolution determines viable strategies. Growth and maturity need different playbooks.
Why it works
The forces work because profit is a bargaining outcome. Every force is a claim on the same pool of value created between willingness-to-pay and cost: buyers pull price down, suppliers push cost up, rivals compete the surplus away, entrants and substitutes cap how far it can be defended. Structure predicts margins because it predicts bargaining power.
Common pitfalls
- ×Listing forces without ranking them — the answer is which two dominate, not all five.
- ×Confusing an attractive market (growing) with a profitable one (defensible).
- ×Treating the industry as one thing when segments have very different structures.
- ×Naming a trend without saying which force it changes and in which direction.
How it is used — from a force to a number
Step 1 of 4
- 1Client is a contract manufacturer; three customers make up 70% of revenue.
Deeper
Deeper: turning five forces into a number
Porter's five forces are only useful if each force is expressed as an economic consequence. Supplier power = the share of revenue captured by an input and how fast its price passes through. Buyer power = the discount off list a large customer actually gets. Entry threat = the payback period a new entrant would face at current prices. Rivalry = whether the industry's price has kept pace with input cost.
Industry structure explains most of the variance in profitability, but not all: within any industry the spread between the best and worst quartile is usually larger than the gap between industries. Structure sets the ceiling; execution decides where in the range you sit.
Must know cold
- ✓Concentration (top-4 share) is the fastest proxy for rivalry intensity.
- ✓Profit pools: map where the money sits along the value chain, not just at your step.
- ✓Substitutes are defined by the job to be done, not by the product category.
- ✓High fixed cost plus undifferentiated product equals price war risk.
Exercises
Try each one on paper before revealing the worked solution.
Exercise 1
An industry: four players hold 85% share, fixed costs are 60% of total cost, products are commodity-like, and one input is 40% of cost from two suppliers. Where does the profit go?
Exercise 2
A new entrant would need 500 of capex to reach 100 of annual EBITDA at current prices. What does that say about entry threat?
High fixed costs push firms to fill capacity, so any volume shortfall turns into price competition. Reading the cost curve before the Five Forces tells you where the price war will come from.