
David A. Aaker, a marketing professor at the University of California at Berkeley and author of the popular Building Strong Brands (1996), has developed a comprehensive brand identity planning model. At the heart of this model is a four-fold perspective on the concept of a brand. To help ensure that a firm’s brand identity has texture and depth, Aaker advises brand strategists to consider the brand as: 1) a product; 2) an organization; 3) a person; and 4) a symbol. Each perspective is distinct. The purpose of this system is to help brand strategists consider different brand elements and patterns that can help clarify, enrich and differentiate an identity. A more detailed identity will also help guide implementation decisions.

Aaker’s Brand Identity Planning Model
Aaker cautions that not every brand identity needs to employ all or even several of these perspectives. For some brands, only one will be viable and appropriate. Each organization should, however, consider all of the perspectives and use those deemed helpful in articulating what the brand should stand for in the customer’s mind.
The following briefly characterizes each of the four perspectives Aaker recommends firms take into account in formulating their brand strategy:
As suggested by Aaker’s elaborate brand taxonomy, brand identity consists of a core identity and an extended identity. The former represents the timeless essence of the brand. It’s central to both the meaning and success of the brand, and contains the associations that are most likely to remain constant as the brand encompasses new products and travels to new markets. The extended identity, on the other hand, includes elements that provide texture and completeness. It fills in the picture, adding details that help portray what the brand stands for. A reasonable hypothesis, Aaker states, is that within a product class, a larger extended identity means a stronger brand—one that is more memorable, interesting and connected to customers’ lives.
Source
Aaker, David A.; Building Strong Brands; The Free Press; 1996.
As an asset, a brand is a symbol of the expected future profits of a company; the problem is how to determine the earning power of a brand. Interbrand, a UK-based branding consultancy, has led the way in defining an appropriate method for brand strength assessment and publishes a yearly chart of the top performers. Its set of criteria, chosen subjectively, includes the business prospects of the brand and the brand’s market environment, as well as consumer perceptions. Interbrand’s seven core criteria consist of the following:
As evinced by these criteria, Interbrand takes a business-oriented rather than consumer-oriented view of brand. This approach is useful, part, because it’s a step closer to putting a financial value on the brand—in fact, Interbrand uses its brand ratings to determine a multiplier to apply to earnings. The subjectivity of both the criteria and assessment of the brands, however, makes the dimensions difficult to defend and affects the reliability of the resulting measures. Moreover, the Interbrand method treats different types of brands in the same way. For example, it treats Gillette as a single entity, even though it has many sub-brands and extensions, and treats Marlboro, which is a single brand, by the same rules. This flaw reinforces the need to develop more refined and rigorous methods of brand analysis.
The premier advertising agency Young & Rubicam (Y&R) has developed a multiple criteria method to assess brand equity growth. The company used its Brand Asset Valuator to assess the brand equity of 450 global brands and more than 8,000 local brands in 24 countries. Each brand was examined using a 32-item survey that included, in addition to a set of brand personality scales, four distinct measures:
According to this approach to brand equity, brand differentiation is the core of a successful brand proposition with a distinctive position in the marketplace that will promote long-term growth. Y&R defines it as the power of a brand to express its uniqueness and reach top-of-mind status with target consumers.
Once consumers are aware of the brand, it needs to be relevant to their needs, satisfying and exceeding their expectations. The way that the brand manager is able to express that relevancy in a language consumers appreciate will determine its success. Once consumers understand what the brand can do for them, they need to aspire to own it, or have esteem for it. Finally, when the brand has communicated its unique, relevant and aspirational message, it will be able to achieve familiarity through repurchase and re-use.
These four measures form the basis of two equations:
The equations represent an attempt to overcome issues with other methods that assess brands solely in terms of present earning power. They suggest that scores relating to brand differentiation and relevance indicate the potential for growth, while those relating to brand esteem and familiarity indicate its present stature. The results, however, are dependent on subjective analyses of the four criteria in relation to the market, the consumer and the company; although there are market research techniques that can better ensure the necessary analyses accurate reflect the competitive milieu.
Below, you’ll find an example of how these dimensions are displayed in Y&R’s ‘power grid.’

Young & Rubicam power grid
This grid allows for a quick and simple comparison among competitors along the two key dimensions identified by Y&R. Brands that are high on both dimensions (the upper-right quadrant) have the greatest equity to protect and exploit. The bottom-left quadrant is generally made up of brands that are just getting started; however, a brand that stays too long in this quadrant is not likely to be successful in the long run. According to the Y&R hypothesis, the brands in the upper-left quadrant are either strong niche brands or brands with a significant opportunity to grow by increasing their stature (knowledge in particular). The lower-right quadrant, in contrast, is populated by brands that are tired, but still retain some esteem and knowledge.