Supplementary Information: Human operational factors and the strategy of score attribution according to survey results Attributed scores Measured Human human operational operational 1 5 2 3 4 factor factor (less (most elements optimal) optimal) Complaints Does not External Consumers’ Permanent Frequent Complaints only during complain factor perception complaints complaints sometimes interventions at all Experience < 2 years 2-5 years 5-10 years years > 20 years More than one, Experience Trainings, More than Never got Once less than once a Once a year courses once a year year Certification None Class 1 Class 2 Class 3 4 Autonomy Evaluated by operator Autonomy Autonomy in Evaluated by operator emergency Complexity of Evaluated by operator work Work Workload Evaluated by operator conditions Difficulty Evaluated by operator Importance of work as an Evaluated by operator Motivation operator Personal Evaluated by operator implication
Supplementary Information: Human operational factors and the strategy of score attribution according to survey results Human operational factor Measured human operational factor elements Attributed scores 1 (less optimal) 2 3 4 5 (most optimal) External factor Consumers’ perception Permanent complaints Frequent complaints Complaints sometimes Complaints only during interventions Does not complain at all Experience Experience < 2 years 2-5 years 5-10 years years > 20 years Trainings, courses Never got Once More than one, less than once a year Once a year More than once a year Certification None Class 1 Class 2 Class 3 4 Autonomy Autonomy Evaluated by operator Autonomy in emergency Evaluated by operator Work conditions Complexity of work Evaluated by operator Workload Evaluated by operator Difficulty Evaluated by operator Motivation Importance of work as an operator Evaluated by operator Personal implication Evaluated by operator
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