Case Study Research Methodology

Introduction

Case studies allow the exploration and understanding of complex issues. Case studies are viewed as a useful tool for exploratory and preliminary research even

though case study methodology is controversial. However, case studies are considered to be a reliable research method. They are “particularly well suited to new research areas or research areas for which existing theory seems inadequate.

This type of work is highly complementary to incremental theory building from normal science research. The former is useful in early stages of research on a topic or when a fresh perspective is needed…the latter is useful in later stages of knowledge” (Eisenhardt, 1989).

Definition

Case study research method is defined “as an empirical inquiry that investigates a contemporary phenomenon within its real-life context; when the boundaries between phenomenon and context are not clearly evident; and in which multiple sources of evidence are used (Yin, 2003).” A case study allows the researcher to examine information about a particular subject within a specific context. A case study may look at a small geographical area in some situations with a limited number of participants. A case study is a unique method for observing “natural phenomenon” that may exist for a given observation (Yin, 2003).

Past Applications of Case Study Research

Case study research is a common methodology used in social science studies. It has been used in many conditions in information systems and agriculture research.

There are many information systems studies that use case study methodology.

Intranet adoption (Zolla, 1999), Internet adoption by SMEs (Mehrtens et al., 2001), human factors in geographic information systems adoption (Nedović-Budić and Godschalk, 1996), electrical and electronic goods adoption for manufacturing firms in India (Lal, 1999), managing academic electronic publishing (Hovav and Gray, 2001), development of a research method to explore sustained delivery of cognitive services (Kaae et al., 2010), Internet standards adoption for IPv6 (Hovav et al., 2004) are a few examples in the stream of literature. There are many studies in

agriculture and dairy management that use case study methodology. Agricultural innovations in developing countries (Feder et al., 1985), small ruminant production in mixed farming systems (Okali and Knipscheer, 1985), new technology adoption in Ethiopian agriculture (Kebe et al., 1990), farmer participatory research review of concepts and recent fieldwork (Farrington and Martin, 1998), precision farming and use (Batte and Arnholt., 2003), and financial implications of changing a farming system (Bennett, 2003) are a few examples in the stream of literature.

Case Study Design

There are two types of case study methods. The single-case design is used when there is only one example or a unique situation that cannot be replicated. A single-case design cannot provide a generalized conclusion because events are limited to one occurrence. The multiple-case design can be adapted to situations where there is evidence of multiple occurrences. The results can be generalized and built more on the application of theory (Yin, 2003), and theoretical proposition development (Campbell, 1975). Therefore, multiple-case design provides validity to the study.

Guidelines for a suitable case study design are suggested (Tellis, 1997). Case study design should:

1. Show that a case study is the only viable method to obtain information.

2. Provide appropriate research questions.

3. Follows a set of procedures with proper application.

4. Follow scientific rules used in the social sciences.

5. Systematically record and archive a ‘Chain of evidence’ when interviews and direct observation are the main sources of data.

6. Link the case study to a theoretical framework.

Types of Case Studies

There are three types of case studies. These types are exploratory, descriptive and

explanatory case studies (Yin, 2003). Exploratory case studies explore a phenomenon and will typically ask general research questions to continue further research. A pilot study is considered to be an exploratory case study (Yin, 2003).

Descriptive case studies are more descriptive and narrative, and specific in scope.

A theory must support the case study. Explanatory case studies can examine from a generalized and specific level. They are used in causal relationships and have more complex multivariate relationships (Yin and Moore, 1987). They suggest that for more complex and multivariate cases, knowledge-driven, problem-solving, and social-interaction theories can be used to explain a phenomena. Interpretive and evaluative case studies are another type of case study that interprets results through conceptual categories (McDonough and McDonough, 1997). Evaluative case studies go a step further by including an opinion of findings by the researcher.

Disadvantages and Advantages of Case Studies

There are some disadvantages of case study research. Case study research is criticized for having a lack of generalization (Scapens, 1990). Biased views can influence the findings and conclusions. A small number of subjects can also provide insignificant foundation for generalization. It is also difficult to conduct and produce documentation, and manage and organize case study research (Yin, 2003). However, there are some advantages for case study research. Proponents of case study research argue that the objective is to generalize back to theory rather than drawing inferences to a larger population. Examined data may be conducted where the activity or use takes place. They also allow both quantitative and qualitative analysis. The study can also be solely quantitative. In addition, qualitative studies are detailed and can explain the complexities that cannot be acquired through quantitative survey research (Yin, 2003). The uniqueness of case studies is that they derive propositions from the research question. The researcher has to make a speculation on the basis of the literature. In addition, other earlier evidence for what they expect the findings of the research to be should be inferred.

The data collection and analysis can then be structured to support or refute the research propositions (Rowley, 2002; Yin, 2003).

Why did we use case study methodology as part of this dissertation research?

Case studies are used to describe and test theory. The aim of this exploratory multi-method case study is to investigate factors regarding the motivation for adopting a dairy management information system. This study can be considered exploratory because the objective is to investigate the motivations for adopting. Therefore, this case study main objective is to explain information system adoption by dairy farms in the form of a theoretical model. The four cases studied are applied to a non-random sample of dairy farmers from different geographic locations in Korea.

Little is known about the adoption of information systems from a dairy context even though there are many studies regarding the adoption of information technology in a nonagricultural setting. Also, this study is unique from a post-adoption approach. The case study farms have already adopted some components and of the system. Therefore, case studies were employed as a research methodology to determine with a real-life setting why farmers that have already adopted this particular DMIS have actually adopted the system. We generalize the findings back to theory. An exploratory multi-case study can be considered an important supplement to the existing literature on adoption and post-adoption motivation of information technology in both agricultural and nonagricultural settings.