2.5. Questionnaire survey
Based on the SVA method, different parts should be assessed by a
questionnaire among experts in the era of security and dam safety. First
of all, the threat should be assessed simultaneously with property
assessment. Then the combination of these factors with attractiveness
gives the criticality of properties. The consequence is achieved based
on the SVA approach. Thus the questionnaires are developed based on four
main goals. First is the evaluation of asset values based on the vision
of the expert. Secondly, it tried to rank threats, and sequentially
investigated the attractiveness of the assets. Finally, the
questionnaires help the researchers to rank the probable consequences.
Table 4 illustrates these goals with related criteria accordingly. 79
experts work in the field of dam security which 50 of them answered the
questionnaires. For the reliability of the questionnaire, the Cronbach
Alpha was assessed, which was equal to 0.83. The result showed that the
reliability of the questionnaire is in the appropriate range.