Five forces analysis

Five forces analysis measures how much profit an industry’s structure allows anyone in it to earn. It scores five sources of pressure on an industry, not on your company, and the answer explains why some markets stay rich and others never do.

That is the line readers trip over. SWOT looks inward at your own strengths and weaknesses; five forces looks outward at the market everyone shares. Two rivals in one industry get the same five forces answer and different SWOT answers.

Michael E. Porter set the frame out in Harvard Business Review in January 2008, arguing that competition for profits goes beyond established industry rivals to take in customers, suppliers, potential entrants and substitutes.

Key takeaways

• Five forces analysis is a reading of an industry’s structure, not an audit of one company’s strengths.
• The five forces are rivalry, buyer power, supplier power, the threat of new entrants and the threat of substitutes.
• Average profitability in a sector is set mostly by structure, which is why hard work rarely rescues a badly structured market.
• Competition regulators read the same structural signals when they assess whether a merger will lessen competition.

How it works

You score each of the five forces as strong, moderate or weak for a defined industry, then read the combined picture. Strong forces drain profit out of the sector; weak forces leave it with the firms inside.

Defining the industry is the hard part, and it is done before any scoring starts. Get the boundary wrong and every score is wrong, which is why a strategic business unit is usually the right unit of analysis rather than the whole corporation.

Scoring needs evidence, not intuition. Competitive intelligence work supplies the inputs: who the buyers really are, what switching costs them, and which suppliers hold a position nobody can route around.

Regulators read structure the same way. United States merger guidelines state that market concentration is often a useful indicator of competitive effects, which is rivalry measured from the outside by someone with subpoena power.

The same guidelines examine whether a merger in a concentrated market would remove a potential entrant, or the pressure that a perceived potential entrant already applies. That is the threat of entry, written as enforcement policy.

Strength is not permanent. A force that was weak for a decade can turn in a year — cheap capital lowers entry barriers, and one large merger can hand buyers or suppliers power they never had.

The output is a position, not a score sheet. A competitive positioning framework turns the reading into a choice — which force you will defend against, and which you will simply avoid.

Examples

Four sectors show how structure, rather than effort, sets the ceiling. Each is read at the industry level, so the conclusion applies to every firm competing in it, including the best run ones.

Passenger airlines. Rivalry is brutal, aircraft suppliers are concentrated into two large makers, fuel is priced elsewhere, and buyers compare fares in seconds. Structure explains the sector’s thin margins better than any management failing does.

Offshore business process outsourcing. Entry barriers are low for a small delivery shop, buyers run competitive tenders, and automation is a live substitute for routine transaction work.

Scale, certification and domain depth are the defences that survive that reading, which is one reason strategic intent matters more in this sector than headcount growth does.

Branded pharmaceuticals. Patents hold new entrants off for a fixed period, buyers are concentrated into insurers and health systems, and substitutes arrive the day exclusivity ends — which is why the whole model is timed around that date.

Grocery retail. Buyers switch for pennies, suppliers range from giant brands to small farms, and discount formats act as a live substitute — three forces pressing at once on a sector that already carries heavy fixed costs.

Note what is missing from all four readings: nothing about any single firm’s culture, talent or brand positioning framework. Those decide who wins inside the industry, not what the industry pays.

Structure sets the ceiling. Position decides where under it you land.

Related terms

• Bull market: a sustained rise in asset prices, which describes sentiment over time rather than the structure of any one industry.
• Bear market: a sustained fall in asset prices, again a market cycle rather than a reading of competitive pressure.
• Competitive intelligence: the evidence gathering that feeds the scoring, not the structural judgement itself.
• Competitive positioning framework: the choice you make after the forces are read, where five forces supplies the diagnosis.
• Strategic business unit: the right boundary for most analyses, since one corporation often competes in several industries at once.

FAQ

Who created five forces analysis?

Michael E. Porter, then at Harvard Business School, published the original article in 1979 and revisited it in Harvard Business Review in January 2008.

How is five forces analysis different from SWOT?

Five forces describes an industry that every competitor shares, while SWOT describes one company. Rivals in the same sector share a five forces reading but never a SWOT.

How often should the analysis be redone?

Whenever a force visibly moves: a large merger, a new substitute technology, a regulatory change or the loss of a major buyer. An annual refresh is enough in stable sectors.

Can five forces analysis be used for services?

Yes, and it often reads more sharply there, because switching costs and supplier concentration in services are easier to observe than in commodity manufacturing.

Does a weak industry mean you should exit?

Not necessarily. It means average returns will be poor, so you need a defensible position rather than a plan built on the sector improving.

Compare sectors, providers and delivery markets on Outsource Accelerator before you commit to one.