Interviews with the owners of both case studies were also done to investigate their personal views in
regards to the implementation of ISP in the assessed buildings. This qualitative method may enrich the
study because, unlike quantitative methods, the qualitative method of semi-structured interview allows
the researcher to focus more on the interviewee’s voice and thought (Bryman, 2008). This study also
analyzes the architectural plan of the buildings in order to assess the areas that meet the guidelines of ISP.