Outline of marketing explained
The following outline is provided as an overview of and topical guide to marketing:
Marketing - social and managerial processes by which products, services, and value are exchanged in order to fulfill individuals' or groups' needs and wants. These processes include, but are not limited to, advertising, promotion, distribution, and product management.
Core concepts in marketing
Marketers may sell goods or services directly to consumers, known as business to customer (B2C marketing); commercial organizations (known as business to business marketing or B2B), to government; to not-for-profit organizations (Not-for-profit organization (NFP)) or some combination of any of these.
Actors and relationships
At the center of the marketing framework is the consumer lies the relationship between the consumer and the organization with the implication that marketers must manage the way the organization presents its public face.
The consumer: Typically, the consumer refers to the end-user - but this may be an individual or group such as a household, family unit or organization. In addition, marketers may need to consider the roles of influencers such as Opinion leaders who increasingly use means such as social media to develop customer to customer networks of influence.
The organization: may be represented by many different actors including: various sales personnel: Agent; Broker; Sales representative; Merchant; Retailer; Street vendor or Vendor
Selling situations & relationships: Depending on the nature of the business operations, many different types of actors are involved in a variety of selling situations involving a variety of sales personnel, who perform varied sales roles. Sales activities involve many different types of customer relationships - from simple transactional exchange through to long-term, enduring customer relationships.
Needs, wants and demands
Marketers typically begin planning with a detailed understanding of customer needs and wants.
A need is something required for a healthy life (e.g. food, water, shelter, emotional bonding); A want is a desire, wish or aspiration; When needs or wants are backed by purchasing power, they have the potential to become demands.
Nature of exchange
Exchange, the act of giving or taking one thing of value in return for another is central to marketing activities. Not all exchange involves Financial transactions, but may also involve barter, contra dealing or other form of trade. The object of exchange can include: Goods; services or experiences; concepts or ideas; causes and may even involve celebrity marketing
Perceptions of value
See also: Customer value proposition.
Traditional thinking around the concept of value was that marketers created value through innovation, product design and manufacture and that Utility was embedded in products or services offered for sale. In this type of thinking, marketer's objective was to communicate a value proposition to potential buyers. However, recent thinking has changed the traditional perspective and now recognizes that consumers may participate in the co-creation of value in a variety of ways. Consumers may derive value through usage and experience, known as value-in-use or may be involved in product design, known as participatory design.
Foundation economic concepts
Given that marketing has its roots in economics, it shares many foundation concepts with that discipline. Most practicing marketers will have a working knowledge of basic economic concepts and theories.
- Competitive advantages & comparative advantagesBusinesses seek to compete by achieving competitive advantages or comparative advantages. Competitive advantages often focus on reducing costs through achieving one or more of the following: Economies of scope; Economies of scale; Experience effects; First-mover advantages. Alternatively a business may seek to develop uniqueness through product differentiation or developing unique competencies such as market sensing, rapid market response or delivering superior customer value.superior value.
- Competition:typesDifferent types of competitive markets can be identified: Duopoly; Monopoly; Monopolistic competition; Imperfect competition; Oligopoly
- DemandUnderstanding demand and supply is essential for determining market size and market potential as well as in the price-setting function.
The basic mechanics of consumer demand include: Demand curve; Demand-led growth; Demand response; Law of demand; Law of supply; Transaction costs.
Different types of demand functions include: Derived demand; Inverse demand function.
- Economic systemsIn Western economies, the capitalist economy dominates. However, other types of economic systems such as barter economies and the Sharing economy can be identified.
- Markets
- ValueValue-in-ownershipValue-in-use
Switching
Planning levels and planning tools
Planning levels
Marketing planning is just one facet of the overall company's planning. Marketing plans must therefore take their guidance from the overall strategic plan or business plan. Most companies produce both a strategic plan and a managerial plan (also known as an operational plan). The distinction between strategic planning and management planning is that they are two phases with different goals.
Strategic planning is fundamentally concerned with the policies that will improve the firm's competitive position. Strategic planning is sometimes called higher-order planning and is usually long-term planning (say 3–7 years) while management planning is short-term and may be carried out for a specific program (e.g. a sales or advertising campaign of a few weeks duration) or carried out annually. Strategic plans typically include a statement of the firm's vision and mission. The Marketing strategy is a plan that shows how the firm's marketing activities will help to achieve the overall strategic goals.
Marketing management is focused on developing the marketing program or Marketing mix (also known as the 4Ps) and is concerned with the implementation of specific action plans designed to achieve objective, measurable targets (SMART objectives). Marketing management plans are typically prepared on an annual planning cycle, but may be prepared for shorter periods for special events such as a product launch, a new logo, change to corporate livery or a repositioning campaign.
Strategic planning tools and techniques
Strategic planning requires sophisticated research and analysis to document the firm's current situation as well as to identify opportunities with the potential to be developed.
Strategic research methods
Strategic research is primarily concerned with the identification of new business opportunities and threats, which derive from the external operating environment. Accordingly, strategic analysts rely less on traditional market research methods. Instead, they use methods such as: Environmental scanning;[1] Marketing intelligence (also known as competitive intelligence)[2] and Futures research[3]
Strategic analysis methods
Marketers draw on a very wide variety of techniques and tools when analyzing the market and the broader operating conditions. The technique selected depends on the nature of the situation or problem to be investigated and the analyst's skill and experience. Strategic analysts employ some 200 different quantitative and qualitative analytical techniques including:[4]
Brand Development Index (BDI)
- Category development index (CDI);[5] Brand/ Category penetration;[6] Benchmarking;[7] Blind spot analysis;[8] Functional capability and resource analysis;[9] Impact analysis;[10] Counterfactual analysis;[11] Demand analysis;[12] Emerging Issues Analysis;[13] Experience curve analysis;[14] Gap analysis;[15] impact analysis;[16] se Analysis (also known as Porter's five forces analysis);[17] Management profiling; Market segmentation analysis;[18] Market share analysis; Market Segmentation analysis;[19] Perceptual mapping;[20] PEST analysis or its variants including PESTLE, STEEPLED and STEER; Portfolio analysis, such as BCG growth-share matrix or GE business screen matrix;[21] Positioning analysis; Precursor Analysis or Evolutionary analysis;[22] Product life cycle analysis and S-curve analysis (also known as technology life cycle or hype cycle analysis); Product evolutionary cycle analysis;[23] Scenario analysis;[24] Segment Share Analysis; Situation analysis;[25] Strategic Group Analysis;[26] SWOT analysis;[27] Trend Analysis;[28] Value chain analysis[29]
Marketing strategies
See main article: Strategic marketing.
Growth strategies
See main article: Growth platforms.
Marketing warfare strategies
See main article: Marketing warfare strategies.
Implementation and control
Implementations and control is an important feature of the planning process. From time to time, marketers will use appropriate measures of performance to gauge whether plans are achieving the desired results. If necessary, corrective action can be taken to get back on track.
Branches of Marketing
The book titled, The Marketing Book, 7th ed., Routledge, Oxon, UK, 2016 edited by Michael J. Baker and Susan Hart identifies the distinct branches of marketing practice as:
For a more detailed breakdown of the relevant topics for each of these key branches of marketing, see Branches of Marketing: Detailed Topics on this page. For special applications of marketing including marketing of specific types of products (e.g. agricultural marketing, faith based marketing, pharmaceutical marketing, political marketing, sports marketing, etc.,) or marketing to specific target groups (e.g. marketing to children, marketing to older people, LBGT marketing) see: Special applications of marketing practice).
Marketing orientations
Marketing orientations are the philosophies or mindsets that guide and shape marketing planning and marketing practice. Some marketing historians believe that different philosophies have informed marketing practice at different times in marketing's history. Although there is no real agreement amongst scholars about the precise nature or number of distinct marketing orientations, the most commonly cited include:
- Marketing orientation (See section: Marketing orientation)
- Production orientation (also see sections: Production orientation or Production orientation)
- Market-orientated
- also known as the Selling orientation (also see sections: Selling orientation or Sales orientation)
The marketing management framework
See main article: Marketing management.
Marketing planning or the process of developing a marketing program requires a detailed understanding of the marketing framework including Consumer behavior; Market segmentation and Marketing research. In the process of understanding the consumer market to be served, marketers may need to consider such issues as:
Consumer basics
Consumer decision-making
See main article: Buyer decision processes.
The main steps in the consumer's purchase decision process are:Need or problem recognition → Information search → Evaluation of alternatives → Product/Brand Choice → Post purchase evaluation
Influences on consumer decision-making
Consumers purchase decisions are influenced by a range of internal and external factors including:
Internal influences
- Beliefs; Demographics; Aspirational age; Aspirational Brand; Culture; Learning; Motivation; Opinion leaders; Risk perception and Loss aversion; Needs; Social class; Values
External influences
- Family; Reference groups; Subculture; Peer group; Pester power; Time
Market research and marketing research
See main article: Marketing research.
See main article: Market research.
Marketing research refers to research activities designed to understand the marketing environment, including competitors, the socio-cultural environment and the politico-legal operating environment. Market research specifically refers to research concerned with understanding the market, that is consumers and is designed to yield actionable customer insights.
Quantitative research methods
Quantitative methods may also be known as Scientific methods.
See main article: Quantitative marketing research.
Qualitative research methods
See main article: Qualitative marketing research.
Specific research tools and techniques
Scale/Questionnaire Design
Sampling
See main article: Sampling (statistics).
Market segmentation and targeting
List of abbreviations for market segments
Market segmentation
See main article: Market segmentation.
Specific approaches to segmenting markets
- (a) Segmenting consumer markets
The main bases for segmenting consumer markets include:
- (b) Segmenting business or industrial marketsThe main bases for segmenting business or industrial markets include:
Measuring market segment size
Targeting
Proprietary segmentation databases and software
To support, market segmentation analysis marketers may require access to databases with large sample sizes. A number of commercial companies provide such data which typically includes proprietary software designed to interrogate the data and backed by algorithms that support different types of segmentation approaches. These commercial databases are often country or region specifically.Popular geo-demographic segmentation databases include:
Popular psychometric tools include:
Statistical techniques used in segmentation analysis
Marketing management: The marketing program (also known as the marketing mix or the 4 Ps)
The marketing program, also known as the marketing mix or the 4 ps consists of the product, price, place and promotion.
See main article: Marketing mix.
See main article: Marketing management.
Product
See main article: Product management.
See main article: Product (business).
New product development (NPD)
See main article: New product development.
Innovation and New product development are an important part of a firm's long term growth strategy.
The steps in a basic new production development process are:
Idea generation (or Ideation (creative process)) →Concept screening→ Concept testing → Business analysis → Product development → Market testing → Commercialization and may include a Soft launch
The NPD process can be applied to:
Products: New product development; Design
Services: Service innovation; Service design
Environmental goods or services: Eco-innovation; Ecodesign; Lean product development
A recent trend in NPD is the use of participatory design, also known as co-design or co-operative design, which involves stakeholders such as employees or consumers in the design process.
Sources of new product ideas include: Research and development; Consumers or Users; distributors, suppliers or crowdsourcing.
Types of innovation
NPD represents a high risk activity. It requires substantial investment and a list of product failures suggests that the probability of failure is relatively high.
New product adoption and diffusion
In order to develop a superior understanding of how new products are adopted by the market place and the factors that influence adoption rates, marketers often turn to a number of models or theories of the adoption/diffusion process:
Legal protection of new products and brands
New product development, including the design of product features, manufacturing processes, packaging design etc. involves creative work and therefore constitutes intellectual property. A number of different legal avenues are available to protect different types of intellectual property.
Brand management
See main article: Brand and Brand management.
Branding strategies
Brand protection
Packaging and labelling
See main article: Packaging and labelling.
Price
See main article: Pricing.
See main article: Price.
Pricing strategies
See main article: Pricing strategies.
Pricing tactics
Place (distribution)
The following methods are prohibited in most nations:
Promotion (also known as marketing communications or integrated marketing communications (IMC))
See main article: Promotion (marketing).
See main article: Marketing communications.
See main article: Promotional mix.
Elements of the promotional mix
Advertising
Advertising models: How does advertising work?
Advertising research
See main article: Advertising research.
Advertising Media
Award-winning advertising campaigns
Internet
See main article: Internet marketing.
- Main types of internet promotion: E-mail spam, e-mail marketing, post-click marketing, Website monetizing, Search engine marketing (SEM), search engine optimization (SEO), Display advertising, * Contextual advertising
Internet advertising methods: Advertising methods: Ad filtering, ad serving, central ad server, pop-up ad, contextual advertising, web banner
Search engine marketing payment methods: pay per click, click fraud, paid inclusion
Internet metrics: Click through rate (CTR), cost per action (CPA), cost per click (CPC), cost per impression (CPI), cost per mille (CPM), effective cost per mille (eCPM)
Advertainment
See main article: Advertainment.
Direct and digital marketing
See main article: Direct marketing.
See main article: digital marketing.
Personal selling
See main article: sales.
See main article: personal selling.
Sales promotion
See main article: Sales promotion.
Public relations
See main article: Public relations.
Sponsorship
See main article: Sponsorship.
Communications planning
- Kelman's source characteristics
Measuring communications effects
The extended marketing mix
The extended marketing mix is used in the marketing of services, ideas and customer experiences and typically refers to a model of 7 Ps and includes the original 4 Ps plus process, physical evidence and people. Some texts use a model of 8 Ps and include performance level (service quality) as an 8th P.
Process
Physical evidence
People
Measuring marketing performance: Marketing metrics
Marketing activities are costly and represent an investment in a company or brand's long term future. With the increased emphasis on accountability, marketers must consider how they measure marketing's performance and communicate that to stakeholders. Various types of metrics that are in widespread use may be classified as:
Measures of market/ competitive performance
Measures of advertising and promotional effectiveness
Measures of brand health
Customer-oriented measures
Special topics in marketing
Branches of Marketing: Detailed topics
Business Marketing
See main article: Industrial marketing.
See main article: Business marketing.
Environmental marketing
See main article: environmental marketing.
International marketing
See main article: International marketing.
Relationship marketing
See main article: Relationship marketing.
Services Marketing
See main article: Services marketing.
Social marketing
See main article: Social marketing.
Retailing
See main article: Retail.
Types of retailer
Types of retail outlet and shopping precincts
Special applications of marketing and promotion
History
See main article: History of marketing.
- History of advertising (section)
- History of advertising (main page)
- History of advertising in Britain article
- History of branding (section)
- History of brand management (section)
- History of marketing research (section)
- History of market segmentation (section)
- History of promotional merchandise (section)
- History of retail (section)
- History of merchants (section)
- History of the market place (section)
- Origins of the positioning concept (section)
- Origins of consumer behaviour (section)
Influential marketing thinkers
- Wroe Alderson (1898-1965) - proponent of marketing science; instrumental in developing the functional school of marketing and in the managerial approach to marketing
- Igor Ansoff (1918-2002) - marketing/ management strategist; noted for the product/market growth matrix
- David Aaker - highly awarded educator and author in the area of marketing and organisational theory
- N.W. Ayer - probably the first advertiser to use mass media (i.e. telegraph) in a promotional campaign and early proponent of media scheduling
- Leonard Berry (professor) (1942-) - author and educator with strong interest in health marketing and relationship marketing
- Neil H. Borden (1922-1962) - coined the term, 'marketing mix'; former President of the American Marketing Association
- Clayton Christensen - educator, author and consultant, published in the areas of innovation and entrepreneurship
- George S. Day - author and educator; has published in the area of strategic marketing
- Ernest Dichter (1907-1991) - market researcher, consumer behaviourist, pioneer of motivational research methods
- Andrew S. C. Ehrenberg (1926-2010) - made contributions to the methodology of data collection, analysis and presentation, and an understanding buyer behaviour and how advertising works
- Edward Filene (1860-1937) - early pioneer of modern retailing methods
- Seth Godin - popular author, entrepreneur, public speaker and marketer
- Paul E. Green (1927-2012) - academic and author; the founder of conjoint analysis and popularised the use of multidimensional scaling, clustering, and analysis of qualitative data in marketing.
- Shelby D. Hunt (1939-) -former editor of the Journal of Marketing and organisational theorist noted for his contributions to RA theory
- John E. Jeuck (1916-2009) - early marketing educator
- Philip Kotler (1931-) - popularised the managerial approach to marketing; prolific author
- E. St. Elmo Lewis (1872–1948) - developed the AIDA model used in sales and advertising
- Christopher Lovelock (1940-2008) - author of many books and articles on services marketing
- Theodore Levitt (1925-2006) - former editor of Harvard Business Review, prolific author of marketing articles and famed for his article, "Marketing Myopia"
- E. Jerome McCarthy - popularised the managerial approach to marketing; developed the concept of the 4Ps (i.e. the 'marketing mix' or marketing program)
- Arthur Nielsen (1897–1980) - early market researcher; pioneered methods for estimating radio and TV audiences and ratings
- David Ogilvy (1911-1999)- advertising guru, early pioneer of the market positioning concept
- Vance Packard - journalist and author, wrote The Hidden Persuaders (1957) which explored the use of motivational research in marketing practice
- Charles Coolidge Parlin(1872-1942) - pioneer of market and advertising research methods
- Rosser Reeves (1910-1984)- advertising guru; advocate of frequency in media schedules
- Al Ries - advertising executive, author and credited with coining the term, 'positioning' in the late 1960s
- Arch Wilkinson Shaw (1876-1962) - early management theorist, proponent of the scientific approach to marketing
- Henry Charles Taylor (1873-1969) - the agricultural marketer
- Richard S. Tedlow - author and educator; published in the area of marketing history
- James Walter Thompson (1847-1928) - founded one of the earliest modern advertising agencies, J Walter Thompson; a very early proponent of using brand image in advertising
- Jack Trout - together with Al Ries, popularised the positioning concept
- Don E. Schultz - father of 'integrated marketing communications' (IMC)
- Stephen Vargo- together with R.F. Lusch developed the Service-dominant logic approach to marketing
- Henry Grady Weaver (1889-1949) - developed the survey questionnaire for use in market research
- Jerry (Yoram) Wind - former editor of the Journal of Marketing, educator and marketer
- Byron Sharp - N.Z. academic; one of the first to document buyer loyalty in empirical work
- Daniel Starch (1883–1979) - psychologist and marketing researcher, developed the so-called Starch scores to measure impact of magazine advertising; Starch scores are still in use
- Gerald Zaltman - developed the Metaphor Elicitation Technique (ZMET)
- Valarie Zeithaml - together with A. Parasurman and L.L. Berry, developed the model of service quality and the SERVQUAL research instrument
Trade magazines and academic journals
Marketing & advertising associations, societies and peak industry associations
Archives, museums and galleries (dedicated to marketing and/or advertising)
Marketing education
External links
Notes and References
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- Fleisher, C. and Bensoussan, B. Strategic and Competitive Intelligence Analysis: Methods & Techniques for Analyzing Business Competition, 2003; Fleisher, C. & Bensoussan, B., Business and Competitive Analysis: Effective Application of New and Classic Methods, 2007; Slater, S. F. and Narver, J. C., "Intelligence Generation and Superior Customer Value," Academy of Marketing Science, Vol. 28, No. 1, 2000, pp. 120–128
- Berkhout, F. and Hertin, J., "Foresight futures scenarios: developing and applying a participative strategic planning tool," Greener Management International, Spring 2002, pp. 37+; Skumanich, M. and Silbernagel, M., "Background on Foresighting Methods," Ch. 2 in Foresighting Around the World, Battelle Seattle Research Centre, 1997, e-text, www.seattle.battelle.org
- Fleitcher, C. and Bensoussan, B., Strategic and Competitive Analysis: Methods and Techniques for Analyzing Business Competition, Prentice Hall, NJ Prentice Hall, 2002
- Farris, p., Bendle, N., Pfeifer, P and Reibstein, D., Marketing Metrics: The Manager's Guide to Measuring Marketing Performance, 3rd edition, [E-book edition], FT Press, 2015, pp 31-35
- Farris, P., Bendle, N., Pfeifer, P. and Reibstein, D., Marketing Metrics: The Manager's Guide to Measuring Marketing Performance, [E-book edition], FT Press, 2015, Chapter 2
- Vorhiesm D. W. and Morgan, N. A., "Benchmarking Marketing Capabilities for Sustainable Competitive Advantage," Journal of Marketing, Vol. 69. January, 2005, pp. 80–94
- Fleisher, C. and Bensoussan, B. Strategic and Competitive Intelligence Analysis: Methods & Techniques for Analyzing Business Competition, 2002
- Blanco, S. Caron-Fasan, M. L. and Lesca, H., "Developing Capabilities to Create Collective Intelligence within Organizations," Journal of Competitive Intelligence and Management, Vol. 1, No. 1, pp. 80–92.
- Aaker, D. A. and Mills, M. K. Strategic Market Management, Pacific Rim ed., Wiley, pp. 79–81
- Booth, C., "Does history matter in strategy? The possibilities and problems of counterfactual analysis", Management Decision, Vol. 41 Issue: 1, 2003, pp. 96–104, https://doi.org/10.1108/00251740310445545
- Kadiyali, V., Sudhir, K. and Vithala R. R., "Structural Analysis of Competitive behavior: New Empirical Industrial Organization Methods in Marketing," International Journal of Research in Marketing, Vol. 18, 2001, pp 161–186
- Terranova, D., "Navigating by the Stars: Using Futures Methodologies to Create a Preferred Vision for the Workforce, a Case Study" Journal of Futures Studies, Vol. 12, No. 3, 2008, pp. 31–44
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- Farris, P., Bendle, N., Pfeifer, P. and Reibstein, D., Marketing Metrics: The Manager's Guide to Measuring Marketing Performance, [E-book edition], FT Press, 2015, Chapter 1
- World Bank, A Users’ Guide to Poverty and Social Impact Analysis, 2003
- Aaker, D. A. and Mills, M. K. Strategic Market Management, Pacific Rim ed., Wiley, pp. 139–40; Aaker, D. A. and Mills, M. K. Strategic Market Management, Pacific Rim ed., Wiley, pp. 88–94; Porter, M., "How to Conduct an Industry Analysis," Appendix A in Competitive Strategy, 1981
- Dickson, P. R. and Ginter, J. L. "Market Segmentation, Product Differentiation, and Marketing Strategy," Journal of Marketing, Vol. 51, No. 2, 1987, pp. 1–10, DOI: 10.2307/1251125, Stable URL: https://www.jstor.org/stable/1251125
- Hunt, S.D. and Arnett, D.B., "Market Segmentation Strategy, Competitive Advantage, and Public Policy: Grounding Segmentation Strategy in Resource-Advantage Theory," Australasian Marketing Journal, Vol. 12, No. 1, 2004, pp 7-25
- McDonald, M. and Leppard, J., Marketing By Matrix, 100 Practical Ways to Improve Your Strategic and Tactical Marketing, Lincolnwood, Ill., NTC, 1993
- Aaker, D. A. and Mills, M. K. Strategic Market Management, Pacific Rim ed., Wiley, pp. 38–39; Porter, M., Appendix A in Competitive Strategy, NY, Free Press, 1980, pp. 361–376
- Foxall, G. R. and Fawn, J. R., "An evolutionary model of technological innovation as a strategic management process," Technovation. Vol. 12, No. 3, 1992, pp. 191–202, https://doi.org/10.1016/0166-4972(92)90035-G
- Holak, S. L. and Tang, E., "Advertising’s Effect on the Product Evolutionary Cycle," Journal of Marketing, Vol. 54, July, 1990, p. 20; Lambkin, M. and Day, G. S., "Evolutionary Processes in Competitive Markets: Beyond the Product Life Cycle," Journal of Marketing, Vol. 53, No. 3. pp. 4–20, DOI: 10.2307/1251339, Stable URL: https://www.jstor.org/stable/1251339; Tellis, G. J. and Crawford, C. M. "An Evolutionary Approach to Product Growth Theory," Journal of Marketing, Vol. 45, No. 4, pp. 125–132, DOI: 10.2307/1251480, Stable URL: https://www.jstor.org/stable/1251480
- Aaker, D. A. and Mills, M. K. Strategic Market Management, Pacific Rim ed., Wiley, pp. 81–83
- West, D., Ford, J. and Ibrahim, E., Strategic Marketing: Creating Competitive Advantage, Oxford, Oxford University Press, 2010, p. 80
- West, D., Ford, J. and Ibrahim, E., Strategic Marketing: Creating Competitive Advantage, Oxford, Oxford University Press, 2010, p. 82
- Helms, M. M. and Nixon, J., "Exploring SWOT analysis – where are we now?: A review of academic research from the last decade", Journal of Strategy and Management, Vol. 3, No. 3, 2010, pp. 215–251, https://doi.org/10.1108/17554251011064837
- Aaker, D. A. and Mills, M. K. Strategic Market Management, Pacific Rim ed., Wiley, 2005, pp. 143–45
- Aaker, D. A. and Mills, M. K. Strategic Market Management, Pacific Rim ed., Wiley, pp. 142–43; Porter, M.,Competitive advantage: Creating and Sustaining Superior Performance, cited in Kotler. P., Marketing Management, 2000, p. 44