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Human Factors
Pages 48-52

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From page 48...
... Inherent deficiencies in a particular system cannot be remedied by post facto operator training. MODELS OF BULK AND TRACE SCREENING Although both bulk and trace explosives-detection equipment are based on different technologies, have different human interfaces, and are deployed in different branches of the TAAS, they are both inspection systems intended to detect threats with minimal false alarms and maximum throughput.
From page 49...
... , management has both an incentive and an opportunity to rethink job designs to reduce the turnover of trained operators. Table 9-1 also shows operator/machine interfaces and personnel issues, such as operator abilities (determined by selection, retention, or job rotation)
From page 50...
... so I a a a ~ ~a ~ By O ~O ~O O ~ ~O C ~ ~ ~C ~C ~C ~ a b o ~ ~b Y b ~8 a ~e =~ ~004 ~44= 4= 0 ;~.
From page 51...
... of the rest of the image because a known false alarm in a bag could be a diversionary tactic to draw attention away from a smaller true threat in the same bag. The operator/machine interfaces in TEDDs, which are capable of determining specific chemical species, are simpler because chemical false alarms are less frequent.
From page 52...
... Current evaluations of both older screening systems and the newly deployed systems are based on direct performance measures, including missed detections, false alarms, and response times. However, measuring performance does not in itself explain why that performance occurred or how it could be improved.

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