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To increase validity and reliability of a qualitative research method, four approaches have to be met; conformability, credibility, transferability and dependability. Conformability stands for neutrality and objectiveness and evaluates if the interpretation of the results was accomplished in a logical and unbiased way and if the conclusion is reflecting the most logical possibility. The credibility or validity can be increased by the evaluation and approbation of the research results by the interviewees, colleagues and experts. The aim is to demonstrate that the research was undertaken in a credible manner. Transferability is analog to the representativeness, which is high in case of similar results among different interviews and it is possible to generalize it. Dependability or reliability serves to indicate the level of stability and coherence of the measures (Riege 2007). As a supporter of solar energy it was of course difficult not to be biased but continuous discussions with the CREDP colleague Sven Homscheid, M.Sc. Technical Advisor and specialist for hydro power plants, helped to neutralize the view and get aware of different aspects. The credibility and validity of the results was increased by comments and evaluations of different experts, Sven Homscheid, the CREDP consultant Winfried Klinghammer, an interviewee Dirk Burkhardt, Managing Director and Chairman of Grenada Solar Power Ltd. and Martin Heins, Sales Manager of the Renewable Energy Department in the Mitsubishi International GmbH, whose opinion was very important as an independent expert without any relations to the project but profound knowledge about the solar energy market. Unfortunately the research time was too short to distribute the results among other experts and interviewees to get more responses. Nevertheless, the study can be seen as representative because many similar answers were given and plausibility was proven by cross-checking. One issue would be the reliability of the gathered economic data. Because of the relatively new and small markets, there did not exist a big variety of data which would allow comparisons. The calculations in chapter 5.4 and 6.4 are mainly based on statements of the private sector and manufacturers and installers generally tend to promoted their products and make them look more attractive. Although there is the awareness of this problem, calculations might still be highly positive. Moreover, the questionnaires served well as a guideline but it was recognized that some questions are too complex and should be revised and simplified for further researches, especially for customers who have a very low knowledge about solar technologies. Methodology 25PDF Image | CARIBBEAN RENEWABLE ENERGY DEVELOPMENT PROGRAMME
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