Identifying and Prioritizing the Environmental Qualities Affecting Informal Settlements Using Fuzzy Delphi Method and Entropy Shannon Technique (Case study of Mashhad Metropolitan City)

Human population's desire for urban spaces which causes the formation of informal accommodation phenomenon, provides a context for the concept defined as quality of urban life. In this regard, recognize and prioritize the qualitative components in the form of physical–spatial characteristics, would be the main focus of this survey. In this study, the research method from is practical and to achieve the goal, both qualitative research method and survey strategy are applied. Collecting data, initially, is done through studying documents, direct site observation and also field impression of space users of informal settings in Mashhad along with survey analytical method via Fuzzy Delphi Technique and questionnaire survey. Finally, the achieved environmental qualities from Delphi Method are ranked based on Entropy Shannon Technique. The results of this study indicate the common problems and needs among the residents and their dissatisfaction with their living space. Based on the survey, in these 4 settlements, through conducting two stages of Delphi questionnaire, environmental criteria affecting the quality of life of settlers were achieved which were classified into 7 thematic categories via Shannon technique. The weight obtained for each category shows the importance of issues with a focus on security, people and activity which are subset of functional discussion in "sustainable place Model". Finally, the model of effective environmental quality indicators in informal settlements in which the weight of each category of indicators and the order of their significance is presented which explains the priority areas of qualitative intervention in these sectors.