Some of the questions of the questionnaires related to each factor of RE and HSEE factors
are shown in Tables 1 and 2, respectively. The questionnaires are filled in by 71 employees
working in 3 different shifts (i.e., morning, evening and night) in the plant. For determining the
reliability degree of each answer, we asked a question about the reliability level: “To what extent do you believe your answer is true?” The detailed demographics of respondents are summarized
in Table 3.