SWOT analysis: how to turn four lists into decisions

Who should use it, and when not to

Use SWOT before a planning cycle, an offsite, or a board meeting, when a team needs a shared picture of where it stands. It also helps when something outside changes, a new rule, a new competitor, a new technology, and you need a structured first response. It works for a company, a product, a team, or a person.

SWOT is a broad first pass, not a precise tool. A strategy textbook from Virginia Tech calls it a brainstorming technique for generating ideas, not a rigorous way to select strategies. For a sharper look at which strengths will last, use VRIO. For whether the industry itself is worth competing in, use the five forces. For choosing between new markets and new products, the growth options matrix fits better.

The four parts, and the TOWS step

Strengths and weaknesses are internal: what the company has or does, compared with named rivals. "Experienced staff" is a strength only if rivals' staff are less experienced. Opportunities and threats are external: demand, competitors' moves, technology, regulation, the economy. Write the condition, not your response to it. "Schools nearby are asking for classroom book sets" is an opportunity; "start a schools service" is a strategy.

Four lists don't tell anyone what to do. Heinz Weihrich's TOWS matrix (1982) adds the step that does, by pairing internal and external items:

Weihrich's article makes three points worth keeping. Start with the external environment, because threats may need attention first. Meeting a threat head-on from strength can backfire, so choose ST responses carefully. And the environment moves, so draw the matrix again at later points in time.

A worked mini example

Illustration: a made-up business; every fact is stated here. Linden Books is an independent bookshop with six staff. It compares itself with a chain store across town and online retailers. Its lease renews next year.

Paired in a TOWS matrix, the items give four options. SO: invite school classes to author events and sell class sets with them (S1×O1). WO: add a simple online order page for schools and regulars (W1×O1). ST: sell event tickets bundled with the book, which online sellers can't match (S1×T2). WT: before renewal, price a smaller unit nearby in case the rent rise goes through (W2×T1).

Linden picks three. The manager pitches both schools on an event plus class sets by next month. A staff member sets up the order page within six weeks. The owner gets a quote for the smaller unit before talks with the landlord. The ticket bundle waits until the school pilot shows results.

How to do a SWOT analysis that leads to action

1. Frame it. Write the unit, the decision the analysis feeds, the time horizon, and the competitors you compare against.
2. List opportunities and threats first. Write conditions outside your control, each with its evidence and source. Keep moves out of this list.
3. List strengths and weaknesses against the named rivals. Keep only internal items, each with evidence of how you compare.
4. Cut to what matters. Keep at most five items per quadrant, ranked by their effect on the decision, and number them. Move items without evidence to a to-check list.
5. Pair them in a TOWS matrix. Write one to three SO, WO, ST, and WT strategies, each naming the items it combines.
6. Choose and assign. Pick three to five strategies, say why these, and give each an owner, a first step, a date, and a measure. Write down what you are not doing.
7. Set the next review. Note which external items are most likely to change and when to redraw the matrix.

The SWOT and TOWS skill runs these steps on your facts and refuses to fill a quadrant with guesses.

Common mistakes

• Four lists and no decision. The most common failure. Without the TOWS step and named owners, nothing changes.
• Moves listed as opportunities. "Expand to Europe" is a strategy. The opportunity is the demand that makes it worth doing.
• Internal and external mixed up. A strength filed as an opportunity can't be paired.
• Strengths every rival also has. Compare against named competitors or drop the item.
• No evidence. Opinions belong on the to-check list until someone backs them.
• A one-off. The outside world moves. Redraw on a schedule.

Where it comes from

SWOT's origin is contested. Many accounts link it to long-range planning work at the Stanford Research Institute in the 1960s, and often to Albert Humphrey, though that link rests mainly on his own later account. Others trace it to Harvard's Business Policy: Text and Cases (1965) by Learned, Christensen, Andrews and Guth; Kenneth Andrews is often credited with the thinking behind the four parts, though the book has no SWOT grid. A 2023 archival study in Long Range Planning by Puyt, Lie and Wilderom credits Robert F. Stewart, whose SOFT approach at SRI was later relabeled SWOT. The TOWS matrix is clearer: Heinz Weihrich published "The TOWS Matrix: A Tool for Situational Analysis" in Long Range Planning in 1982. This page is an independent summary in our own words, not written, reviewed, or endorsed by any of these authors or their publishers. For other frameworks, see the strategy books index.

Questions

What is the difference between SWOT and TOWS?

SWOT lists strengths, weaknesses, opportunities, and threats. TOWS, from Heinz Weihrich's 1982 article, pairs them into four kinds of strategy: SO, WO, ST, and WT. SWOT describes the situation; TOWS turns it into options.

Who invented SWOT analysis?

It's contested. It is often linked to the Stanford Research Institute in the 1960s and to Albert Humphrey; Harvard's Business Policy textbook (1965) is also cited. A 2023 archival study credits Robert F. Stewart's SOFT approach at SRI as the origin.

How many items should each quadrant have?

Few enough to act on. Five or fewer per quadrant, each with evidence, is a practical limit; long lists hide the items that matter.