Guide to Advanced Empirical



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2008-Guide to Advanced Empirical Software Engineering
3299771.3299772, BF01324126
8. Practical Considerations
In addition to the question of how well the methods fit a given type of research question and philosophical stance, the choice of methods also depends on practical considerations. Often these practical considerations force the researcher to change the original research design in terms of the choice of method, data collection and analysis procedures. It is important to document the original planned research protocol, and all subsequent deviations to it, to allow other researchers to understand the study design, interpret the research results, and replicate the study.
Most of the practical challenges relate to time, budget and personnel resources, and access to data. Rather than describe the challenges for each method individually, we summarize the challenges related to groups of methods, according to the type of data they deal with:
Methods that are primarily qualitative include ethnography, case study, and action research. These methods rely on fieldwork, using techniques such as participant observation and interviews. Key challenges include preparing good questions for


308 S. Easterbrook et al.
structured or semi-structured interviews, and finding the time and resources needed to collect and analyze potentially large sets of data. The researcher needs a thorough training in how to observe and record social behaviour. Access to the field situation may require prolonged time in establishing a relationship with the subject organization such that specific project data is made available. For ethnography, the researcher needs to find a community where she is accepted as a member, which might not be possible unless she has appropriate technical experience. For action research, the researcher needs to balance the need to involve the organization in helping to set appropriate goals for the research with the need to remain objective, such that the research does not become merely consulting.
Methods that are primarily quantitative include controlled experiments and survey research. These methods require more significant time in the planning of the research than strictly qualitative methods. To achieve external validity for both experiments and surveys, the researcher needs the time and budget to (1) define, recruit and (if possible) randomly select a sample population that is representative of the target population, (2) design and pilot the questions such that all respondents are presented with questions that they interpret and understand inexactly the same way (therefore careful attention to detail in phrasing the questions is needed, and
(3) define statistical tests ahead of time, in order to interpret the collected data. The goal here is to plan ahead, for smooth analysis and interpretation of results.
All research conducted in industrial settings brings a number of challenges. It can be very hard to gather data to find out what practitioners actually door what needs to be improved in the organization, rather than what practitioners say they door think require improvement. Data quality can also bean issue (see Chaps. 1 and
7 for more on this issue. In return for access to the organization, the researcher usually has to give up some control. For example, it is hard to observe and document findings without interfering with the observed situation, especially when the industrial partners want to know in advance what the expected outcomes are. It is often difficult to know if changes are made through involvement in the research or would have occurred anyway (cf, the Hawthorne effect. Finally, obtaining permission to publish the results can be a challenge. Delays in publication are likely if the organization has concerns about inclusion of confidential data or insights in the research. Singer and Vinson (2002) and Vinson and Singer (2004) discuss the unique ethical challenges involved in research in industrial settings.

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