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Table 1.

Generic Task Type descriptions and GEP values.

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Table 1 Expand

Table 2.

EPC definition and related maximum value.

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Table 2 Expand

Fig 1.

Hierarchical structure of uncertainty.

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Fig 1 Expand

Fig 2.

A simple Z-number, .

is a fuzzy restriction and is the reliability of value.

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Fig 2 Expand

Fig 3.

Transforming of Z-number to Fuzzy number.

α is crisp value of reliability side of Z-number. is the left side of Z-number and is the final normal Fuzzy number.

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Fig 3 Expand

Fig 4.

Algorithm of the proposed approach.

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Fig 4 Expand

Table 3.

Score rating of different experts.

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Table 3 Expand

Table 4.

Corresponding Z-applied set.

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Table 4 Expand

Table 5.

Hierarchical task analysis for the de energization power line.

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Table 5 Expand

Table 6.

Human error probability results.

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Table 6 Expand

Fig 5.

The Z-numbers related to APOA for EPC1 of subtask T1.

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Fig 5 Expand

Table 7.

Expert weighting importance.

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Table 7 Expand

Table 8.

Z-APOA for subtask T1-EPC1 (considered β = 0.5).

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Table 8 Expand

Table 9.

HEART calculations of EPC1 for subtask 2.

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Table 9 Expand

Fig 6.

Results of sensitivity analysis of T10 and T20 (logarithmic scale dispersion).

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Fig 6 Expand

Fig 7.

HEP distribution for subtasks of de energization power line.

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Fig 7 Expand