SWOT and Porter's Five Forces
These are the two classic business-school strategy lenses every PM is expected to know, so I'll cover them honestly: what each is genuinely good for, and where each falls down for product work. Both predate software, both are diagnostic rather than generative, and both are routinely run as box-filling exercises that produce a slide and zero decisions. Used with judgment, they're useful framing. Used as ritual, they're theater.
#SWOT, a fast internal/external scan
SWOT (Albert Humphrey / Stanford, 1960s) sorts factors into a 2×2: Strengths, Weaknesses (internal, present) and Opportunities, Threats (external, future). It's quick, it's shared-vocabulary, and it forces an outside-in glance teams often skip.
| Helpful | Harmful | |
|---|---|---|
| Internal | Strengths | Weaknesses |
| External | Opportunities | Threats |
SWOT generates an inventory, not a decision, and most teams stop the moment the four boxes are full, as if listing things were strategy. The list is unprioritized (is this strength your moat or a triviality?), often subjective, and produces no action by itself. The only version worth doing is TOWS, which crosses the quadrants into moves: use a Strength to capture an Opportunity (S-O), shore up a Weakness against a Threat (W-T). If your SWOT didn't end in "therefore we will...", you filled in a grid and called it thinking.
#Porter's Five Forces, the structural attractiveness of a market
Michael Porter (HBS, 1979) analyzes the profit potential of an industry via five competitive forces: competitive rivalry (center), threat of new entrants, bargaining power of suppliers, bargaining power of buyers, and threat of substitutes. The logic: profit gets competed away when forces are strong, so attractive industries are ones where you can erect barriers.
Rivalry: how brutal is head-to-head competition? New entrants: how easily can newcomers attack? (Barriers to entry.) Supplier power: can your inputs dictate terms? Buyer power: can customers force prices down? Substitutes: can a different kind of solution displace the category?
Five Forces is a market-entry and positioning lens, best when you're choosing whether to enter a space or assessing structural defensibility. It pairs naturally with competitive analysis (the granular who's-who) and DHM (Porter says where moats are possible; "hard-to-copy" is how you build one).
#Where they fit in product, and where they badly don't
Both lenses operate at the industry / company altitude, and that's their honest home: a market-entry decision, a competitive-positioning section in a strategy doc, an annual planning offsite. Neither tells you what to build next sprint, neither models individual users or jobs, and Porter in particular was built for stable industrial markets, so it underweights network effects, platforms, ecosystems, and the speed of software disruption. For actual product strategy I lean far harder on JTBD, DHM, and the North Star. Treat SWOT and Five Forces as occasional framing for high-altitude conversations, run them to a decision, and never mistake a filled-in template for having a strategy. A grid is not a point of view.
#Continue Reading
- Competitive Landscape Analysis for the granular competitor read that feeds both lenses.
- The DHM Model is Biddle's defensibility model: where Porter says moats are possible, DHM builds them.
- Business Acumen and Models for the broader business literacy these lenses sit inside.
- Jobs To Be Done for the user-altitude lens these company-altitude tools can't reach.
- The Frameworks Toolkit for the full index of tools and when each earns its place.