What a SWOT analysis is
SWOT analysis is a 2x2 grid that separates what helps and what hurts a strategy, inside and outside the company: Strengths, Weaknesses, Opportunities and Threats. Strengths and weaknesses are internal and controllable; opportunities and threats come from the market and can only be monitored.
In manufacturing, the value is not in filling the grid but in using it to decide where to invest, what to fix first and what to stop doing. The tool is often credited to Albert Humphrey of the Stanford Research Institute, though its exact origin is debated; today it is standard in strategic planning.
SWOT analysis visual map
The map shows the 2x2 matrix, the scoring of the example factors and the cross into strategies.
The four quadrants on the shop floor
| Helps reach the objective | Hinders the objective | |
|---|---|---|
| Internal origin | Strengths (S) | Weaknesses (W) |
| External origin | Opportunities (O) | Threats (T) |
- Strengths: what the plant does better than competitors, such as delivery, technical skill, certifications, conversion cost and a stable workforce.
- Weaknesses: internal losses and limits, such as low OEE, long changeovers, rework, dependence on few customers and missing data.
- Opportunities: favorable outside changes, such as new segments, incentives, financing and customers who want local suppliers.
- Threats: outside risks, such as raw-material price rises, imports, regulatory change and skilled-labor shortages.
Quick test: if the company can change the factor by its own decision, it is internal. If it depends on the market, the government or the customer, it is external.
Worked example: a machining job shop
Fictional example: a mid-size metalworking company machining parts to order. The team lists six internal and six external factors and gives each a weight (each list sums to 1.00) and a rating from 1 to 4. For internal factors, 4 = major strength, 3 = minor strength, 2 = minor weakness, 1 = major weakness. For external factors, the rating is how well the company responds: 4 = responds very well, 1 = responds poorly.
Score = Σ (weight × rating)
Internal factors
| Factor | Weight | Rating | Weight × rating |
|---|---|---|---|
| Experienced maintenance team | 0.15 | 4 | 0.60 |
| On-time delivery above 95% | 0.15 | 3 | 0.45 |
| Valid ISO 9001 certificate | 0.10 | 3 | 0.30 |
| 58% OEE in machining | 0.20 | 1 | 0.20 |
| 90-minute changeover on tool swaps | 0.15 | 2 | 0.30 |
| One customer at 40% of revenue | 0.25 | 1 | 0.25 |
| Total | 1.00 | 2.10 |
Internal score: 0.60 + 0.45 + 0.30 + 0.20 + 0.30 + 0.25 = 2.10. The theoretical average is 2.50; below it, the internal position is weak.
External factors
| Factor | Weight | Rating | Weight × rating |
|---|---|---|---|
| Demand for renewable-energy parts | 0.20 | 4 | 0.80 |
| Financing line for modernization | 0.10 | 3 | 0.30 |
| Customers looking for a local supplier | 0.20 | 3 | 0.60 |
| Rising steel prices | 0.15 | 2 | 0.30 |
| Imported competitor priced 12% lower | 0.20 | 1 | 0.20 |
| Shortage of CNC operators in the labor market | 0.15 | 2 | 0.30 |
| Total | 1.00 | 2.50 |
External score: 0.80 + 0.30 + 0.60 + 0.30 + 0.20 + 0.30 = 2.50, exactly average: the company captures part of the opportunities and defends poorly against threats.
Reading: with 2.10 internal and 2.50 external, the focus is not expansion but fixing weaknesses. The two heaviest weaknesses, single-customer dependence (0.25) and 58% OEE (0.20), go first on the action list. For the OEE math, see OEE: how to calculate overall equipment effectiveness.
From SWOT to strategy: the TOWS matrix
The most common mistake is stopping at the list. The TOWS matrix, proposed by Heinz Weihrich in 1982, crosses each pair of quadrants to produce concrete actions:
| Cross | Combination | Strategy in the example |
|---|---|---|
| SO (offensive) | Strength + opportunity | Use the maintenance team and 95%+ on-time delivery to bid for renewable-energy parts and local-supply contracts |
| WO (reinforce) | Weakness + opportunity | Use the financing to cut the 90-minute changeover and lift the 58% OEE, freeing capacity for the new demand |
| ST (defend) | Strength + threat | Defend price against the imported part with ISO 9001, delivery performance and local service |
| WT (survive) | Weakness + threat | Reduce dependence on the customer at 40% of revenue and train CNC operators in-house |
In the example, the WO action attacks changeover with SMED, and the WT action calls for a customer diversification plan. Each strategy becomes a target, an owner and a deadline; structure them in a 5W2H action plan.
How to run it in 6 steps
- Define the objective: the unit, product or decision under analysis. A SWOT without focus becomes a generic list.
- Gather data: OEE, on-time delivery, complaints, costs, customer mix, market reports.
- List the factors with a cross-functional team (production, quality, sales, maintenance), backed by evidence and numbers.
- Weight and rate each factor and add them up, as in the example.
- Cross the quadrants in the TOWS matrix and write the strategies.
- Prioritize, assign an owner and a date, and review the grid each planning cycle, usually once a year.
When many candidate actions compete, rank them with the GUT matrix. To tie the result to annual company goals, see Hoshin kanri and the Balanced Scorecard.
Common mistakes
- Vague factors, such as "good team", with no number or evidence behind them.
- Mixing internal with external: "shortage of operators in the market" is a threat; "lack of training" is a weakness.
- Lists that are too long: more than 6 to 8 factors per quadrant hide what matters.
- Running it alone in the boardroom, without shop-floor and sales input.
- Stopping at the grid: with no crossing, target and owner, nothing changes.
- Treating the grid as final; markets move and the analysis needs review.
Frequently asked questions
What is a SWOT analysis?
A 2x2 grid that organizes Strengths and Weaknesses (internal) and Opportunities and Threats (external) to support strategic decisions.
How do you do a SWOT analysis in manufacturing?
Define the focus, gather production and market data, list the factors with the team, weight and rate them, cross them in the TOWS matrix and turn the result into actions with owners and dates.
What is the difference between SWOT and TOWS?
SWOT is the diagnosis (the list of factors). TOWS is the next step: it crosses the quadrants to generate SO, WO, ST and WT strategies.
How do you score the factors?
Give weights that sum to 1.00 in each list and ratings from 1 to 4. The score is the sum of weight × rating; the theoretical average is 2.50.
Is a strength internal or external?
Internal. Strengths and weaknesses are under the company’s control; opportunities and threats come from the outside environment.
How often should a SWOT be reviewed?
At least once a year with planning, and whenever customers, competitors, costs or regulations change significantly.
Sources
- WEIHRICH, H. The TOWS matrix: a tool for situational analysis. Long Range Planning, v. 15, n. 2, 1982.
- DAVID, F. R. Strategic Management: Concepts and Cases. Pearson (IFE and EFE matrices).
- PORTER, M. E. Competitive Strategy. Free Press, 1980.
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About the author
Lean Manufacturing & Behavioral Management Specialist
Over 20 years in the automotive and metalworking industries (GM and Dana), Lean Manufacturing practitioner since 2006. SENAI instructor and mentor in Brazil’s Brasil Mais Produtivo program, delivering consulting, training and audits for 50+ companies, combining quality, productivity and people development.
