Evaluating Web Site Quality: A Benchmarking Approach

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Karyn N. Lewis 0105-440-01 Internet Marketing Rochester Institute of Technology Winter 20082 Research Paper

Evaluating Web Site Quality: A Benchmarking Approach

Executive Summary Quality web site design is a critical success factor for corporations with an e-commerce strategy. The assessment of web site quality is considered a problem of measuring user satisfaction in order to analyze user perceptions and preferences, requiring a set of o f guidelines— guidelines—or criteria— criteria—from which corporations can benchmark their design activities. An effective web site evaluation model is one that makes it possible to pinpoint the web characteristics that contribute to improving virtual customers’ attitudes and purchasing intentions. Much of the previous research done on web quality assessment proposes a multivariate approach because of the complexity and the multi-dimensional nature of the problem. From specified quality features, a set of satisfaction criteria can be assessed reflecting all aspects of user perceptions about web site quality. This method of data collection and analysis assumes a multicriteria preference disaggregation approach following an ordinal regression model, which provides quantitative measures of customer satisfaction considering the qualitative form of customers’ customers’ judgments. The main objective of this method is the gathering of individual judgements into a collective value function, assuming the client’s satisfaction depends on a set of criteria. From this data, a series of perceptual maps—comparative maps—comparative performance diagrams— diagrams—can be developed to benchmark a set of competing organizations and define possible improvement actions according to customer satisfaction.

Introduction In the virtual enterprise, quality web site design is a critical success factor for corporations with an ecommerce strategy because most contact with customers hinges on their interaction through a web site (Joia & Barbosa de Oliveira, 2008). Most B2C e-commerce web sites, however, were not developed to cater to this aspect. Although companies may try to emulate human behavior with technology, the interaction is different due to many aspects that technology cannot replace— replace—courtesy, friendliness, helpfulness, care, commitment, flexibility, and cleanliness. With the proliferation of web sites and the commercial Internet invested in them, the assessment of web site quality has evolved as an important activity (Grigoroudis et al., 2008). Business organizations throughout the world invest a great deal of time and money in order to develop and maintain quality sites to provide effective communication and information channels to their customers. The assessment of web site quality is considered a problem of measuring user satisfaction in order to analyze user perceptions and preferences (Grigoroudis et al., 2008). Avoidance of poor web site design demands a set of guidelines— guidelines—or criteria— criteria—from which corporations can benchmark their design activities (Kim et al., 2003). Having this basic set of criteria serves the corporation’s effort when evaluating, com paring, monitoring, managing, and designing web sites. The Need for Web Site Quality Assessment Modern web sites present a wide variety of features, complexity of structure and offered services (Grigoroudis et al., 2008). Evaluation is an aspect of site development and operation that often contributes to maximizing invested resources in serving user needs and expectations. A quality-oriented approach to web site assessment would consider the web site as the product and the user as the customer, focusing on the analysis and

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assessment of web site features that affect overall user satisfaction (Zhang & von Dran, 2001). Thus, exploring web site quality and user expectations is the crucial key for site improvement. When a consumer accesses a corporation’s web site, the appearance, structure, and maintenance status all influence the consumer’s perception of both the transaction experience and the corporate image (Kim et al., 2003). These characteristics of customer and company interaction developed via a web site are linked to the subjective and objective elements that influence purchase, which makes careful web site planning of paramount importance. An effective web site evaluation model is one that makes it possible to pinpoint the web characteristics that contribute to improving virtual customers’ attitudes and purchasing intentions. The goal is to distinguish clearly between the external aspects of web sites— sites—those related to the particular behaviors of the user —from their internal aspects, or those related to their design (Joia & Barbosa de Oliveira, 2008). In this way, the relationships between the many different factors affecting a web site’s rating can be found in order to understand their contribution to the closure of an online purchase. Existing Web Site Quality Assessment Research Literature on web site quality assessment includes the perspectives of a broad range of experts in human factors, cognitive psychology and web development, as well as research addressing issues associated with the design and usability of web products (Grigoroudis et al., 2008). Traditional research on web site evaluation methods offers insight in achieving usable web-based interfaces. Several authors have undertaken studies regarding B2C ecommerce web site evaluation using a variety of conventional methodologies including usability testing (e.g., Zimmerman, et al., 1998 cited in Hassen & Li, 2005), expert review (e.g. Zhang & von Dran, 2000 cited in Hassen & Li, 2005), case studies (e.g., Smith, Newman, & Parks, 1997 cited in Hassen & Li, 2005), and automated assessment (e.g., Tausher & Greenberg, 1997 cited in Hassen & Li, 2005). 200 5). In several cases, web site quality has been related to the level of user expectations fulfillment and quality standards (Grigoroudis et al., 2008). The SERVQUAL model (Parasuraman et al., 1985, 1988, 1991 cited in Grigoroudis et al., 2008) has also been used for web site quality assessment, proposing a universal set of quality dimensions (tangibles, reliability, responsiveness, assurance and empathy). Much of the previous research done on web quality assessment proposes a multivariate approach because of the complexity and the multi-dimensional nature of the problem. Several web site quality aspects can be found in the literature, which may be summarized in the following principal quality dimensions listed by Grigoroudis et al. (2008): a. Content: Content: Related to the responsiveness of a web site to satisfy user inquiry and trust regarding the information offered (Beck, 1997 cited in Grigoroudis et al., 2008); described in several dimensions such as utility of content (Grose et al., 1998 cited in Grigoroudis et al., 2008), content integration (Winkler, 2001 cited in Grigoroudis et al., 2008), completeness of information, subject specialization (Nielsen, 2002 cited in Grigoroudis et al., 2008), and content credibility. b. Personalization: Personalization: Examined at the following levels: personalization of information (Blankenship, 2001 cited in Grigoroudis et al., 2008), personalization of interface (Brusilovsky, 2001 cited in Grigoroudis et al., 2008), and personalization of layout (Winkler, 2001 cited in Grigoroudis et al., 2008). c.

Navigation: Navigation: Reflects the support provided to users when moving in and around a site, including the following dimensions: convenience of navigation tools (Vora, 1998 cited in Grigoroudis et al., 2008), means of navigation, ease of use of navigation tools, and links to other sites.

d. Structure and design: design: Examined at the following levels: loading speed (Virpi and Kaikkonen, 2003 cited in Grigoroudis et al., 2008), technical integrity (Shredo, 2001 cited in Grigoroudis et al., 2008), real time information, software requirements, and browser capability (Vora, 1998 cited in Grigoroudis et al., 2008).





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In the current era of e-commerce, researchers must consider the addition of business-related evaluation criteria to the more dominant ones (Kim et al., 2003). Researchers have recently suggested various personalization schemes that ostensibly make the visitor interested in the site and guide him or her to important pages (Jenamani & Mohapatra, 2006). Studies have been conducted to provide unique navigation structure for the individual user using personalization techniques built on user behavior models. According to Zhang and von Dran (2001), however, designers must first have a thorough understanding of the different quality dimensions that affect user expectations. They must then be able to relate these quality characteristics to specific design features. Application & Understanding of the Benchmarking Technique Benchmarking is a measuring method widely to improve organizations (Elmuti, 1998). The essence of benchmarking is the process of identifying the highest standards of excellence for products, services, or processes, and then making the improvements necessary necessary to reach those standards. It’s more than just a means of gathering data on how well a company performs against others—it’s others —it’s a method of identifying new ways to improve processes. Benchmarking strategies establish methods of measuring each area in terms of units of output as well as cost, ultimately helping organizations faithful to the process achieve cost savings. Successful implementation of benchmarking has been credited with helping to improve quality, cut costs in manufacturing and development time, increase productivity, and improve overall organizational effectiveness. In web site quality evaluation, benchmarking can be used to measure the performance of a web site against its competitors’ in order to identify its strengths and weaknesses.

Table 1 Web site quality assessment assessment criteria Criterion Definition Relevance

It is related to the user perception regarding the significance of web site’s content to the visitor’s inquiry. The web site is relevant according according to the degree that the informatio informationn it contains is relevant to visitor’s interests

Usefulness

Usefulness extends relevance to the nature of the specific visitor’s inquiry. Developers should continuously check information contained in the web site to assess usefulness to a wide audience of visitors. Often, web site administrators ask visitors to evaluate provided information, or offer star based qualification of web site material

Reliability

Reliability is related to accuracy of information contained in the web site. Often designers include a note about last update of information. Doing so they help the visitor in forming an opinion regarding web site’s reliability

Specialization

Specialization captures the specificity of information contained in the web site. It contributes to web site relevance and usefulness, usefulness, yet places a heavier burden on reliability

Architect ure

Architecture Architectur e concerns the way that the content is organized in a web site. This dimension is particularly particular ly focused on the arrangement of objects, which are used to convey information to visitors

Navigability Navigabili ty

This dimension reflects both the easiness and the convenience of moving in and around the site

Efficiency

Efficiency captures the technical performance characteristics of the web site (e.g. is it fast? does the visitor get advance notice about the estimated time it may take to retrieve information?)

Layout

Layout reflects the unique aspects of the web site involved in the presentation of objects. It is related to its architecture, yet it is used to differentiate the web site based on its unique design characteristics

Animation

This dimension concerns the moving objects involved in the presentation of information and the web site-user interaction

Source: Grigoroudis et al., 2008 *





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In order to analyze the data accrued from fro m a satisfaction survey, statistical methods and multivariate analysis techniques must be used (Joia & Barbosa de Oliveira, 2008). The former are useful for analyzing each variable graphically, identifying outliers, and confirming necessary premises. The latter are useful for validating the proposed model as a whole as well as the relationships among the constructs. From the aforementioned quality features, a set of satisfaction criteria can be assessed reflecting all aspects of user perceptions about web site quality, as seen in Table 1. These satisfaction criteria are based on research by Moustakis et. al, 2004, who conducted a wide experimental survey in order to conclude a relevant set of quality features pertaining to user perceptions and preferences (Grigoroudis et al., 2008). Customer satisfaction surveys often include both overall and partial satisfaction judgments for a set of criteria, requiring satisfaction judgement to be included in the qualitative data collected in a benchmarking analysis. Thus, satisfaction-benchmarking analysis is usually a problem of exploring this ordinal data and evaluating collective measures of satisfaction performance. This method of data collection and analysis assumes a multicriteria preference disaggregation approach following an ordinal regression model which provides quantitative measures of customer satisfaction considering the qualitative form of customers’ judgments (Grigoroudis et al., 2008). The main objective of this method is the gathering of individual judgements judgements into a collective value function, assuming the client’s satisfaction depends on a set of criteria like the aforementioned characteristics used to assess web site quality. This ensures maximum consistency between value functions and customers’ judgements. judgements. The results of the method would be based on evaluation criteria weights and additive/marginal value functions. From this data, a series of perceptual maps— maps —comparative performance diagrams— diagrams—can be developed to benchmark a set of competing organizations and define possible improvement actions according to customer satisfaction (Grigoroudis et al., 2008). Criteria weights and satisfaction indices could be combined to indicate the strong and weak points of customer satisfaction and define required improvement efforts. These diagrams would present the average satisfaction indices of a particular company in relation to its competition. They are divided into four quadrants and can be used as a benchmarking tool in order to assess the performance of different char acteristics acteristics of a company’s web site against its competitors, as in Fig. 1 and Fig. 2 below. Fig. 1. Action diagram.

Fig. 2. Comparative performance diagram

Source: Grigoroudis et al., 2008

Web sites usually contain enormous amounts of information spanning hundreds of pages (Jenamani & Mohapatra, 2006). Without proper guidance, a visitor often wanders aimlessly without visiting important pages, loses





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The satisfaction benchmarking analysis is mainly focused on the performance evaluation of competitive organizations against the satisfaction criteria, as well as the identification of the competitive advantages of each company (Grigoroudis et al., 2008). The analysis is based on comparative performance diagrams produced by the multicriteria preference disaggregation method, which can help each company to locate its position against competitors, pinpoint weak points and determine which criteria will improve its overall site performance, as in Table 2. Table 2 Example: Average satisfaction indices (%) Criteria Company A Company B Relevance 81 Usefulness 79 Reliability 79 Specialization Specializa tion 77 Architect ure Navigability Navigabili ty 72 Technical efficiency 46 Layout 67 Animation Animatio n Global 68

Company C

83 73 82 76 71

73 70 75 68 68

72 51 74 31

72 62 47 62

23 66

21 61

Source: Grigoroudis et al., 2008 *

Conclusion As e-commerce expands, the design of web sites becomes a critical success factor (Kim et al., 2003). Web sites are often the main interface between businesses and consumers, making their design as important as a store’s layout and aesthetics. In order to check the efficiency and effectiveness of a design, good evaluation criteria are needed. It is critical to consider all aspects of the virtual arena, so as not to miss important explanations about a web site’s performance (Joia & Barbosa de Oliveira, 2008). Moreover, the user’s characteristics must be established in order to better understand his/her behavior in a digital environment. The main objective of a user satisfaction analysis is the identification of customers’ attitudes and preferences. This type of analysis would include relative importance and level of demand for different satisfaction dimensions of customers (Grigoroudis et al., 2008). The main advantage of this type of method is that it fully considers the qualitative form of customer judgements and preferences, as expressed through customer satisfaction surveys. Furthermore, the method is able to assess an integrated benchmarking system, given the wide range of results provided. Thus, discussion is not solely focused on the descriptive analysis of customer satisfaction data, but is able to emphasize customer preferences and expectations. Customer satisfaction benchmarking analysis is a useful tool for modern business organizations in order to locate their position against competition (Grigoroudis et al., 2008). It provides an organization with the ability to identify the most critical improvement actions and adopt the best practices of an industry. This type of coordination and cooperation for conducting analysis demands a great deal of integration that is normally still difficult to do (Joia & Barbosa de Oliveira, 2008).





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Evaluating Web Site Quality: A Benchmarking Approach

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