The Optimum Speed of Visual Inspection Using a Random Search Strategy

Morawski, Thomas B.; Drury, Colin G.; Karwan, Mark H.

doi:10.1080/07408179208964252

Cited by 23 publications

(9 citation statements)

References 10 publications

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“…One of the earliest economic models was proposed by Morawski et al (1980) who formulated models for the two extremes of search strategy and derived economically optimal stopping times for inspection. Later, two models were proposed to derive an optimal pacing speed to balance the cost of time and the cost of errors using both random (Morawski et al 1992) and systematic search strategies (Karwan et al 1995).…”

Section: The Design Of Visual Inspection Systems 235mentioning

confidence: 99%

Theoretical issues in the design of visual inspection systems

Jiang

Gramopadhye

Melloy

2004

Theoretical Issues in Ergonomics Science

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The objective of this review essay is to both chronicle and analyse literature in the area of visual inspection. Classical as well as contemporary papers are included to describe both the historical development and the state of the art of visual inspection theories and technologies. Human operators, despite well-documented problems, often perform visual inspection. While supervized machine systems obviate some of the problems associated with human inspectors, other problems still exist. In particular, accounting for a supervisor's perception of a machine's performance (as gauged, e.g. by trust) and consequent actions. The difficulties associated with these two alternatives have led to the emergence of a third alternative: collaborative human/machine or hybrid systems, which combine the advantages of both alternatives-in theory. However, in practice, how to best distribute the functions between a human and machine, in a dynamic environment in real time, is problematic. Moreover, a human's perceptions of its counterpart's performance remain an issue. These unresolved problems are subjects for future research. In the interim, the alternatives are critiqued to create a basis for establishing guidelines to select the alternative that is best suited for a given situation.

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Section: The Design Of Visual Inspection Systems 235mentioning

confidence: 99%

Theoretical issues in the design of visual inspection systems

Jiang

Gramopadhye

Melloy

2004

Theoretical Issues in Ergonomics Science

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“…Such curves are the SAOC's of visual search, and are shown in Figure 5.10. Given such SAOC's, then the optimum time for searching can be calculated (Morawski, Drury and Karwan, 1992) based upon the reward for speed and the penalty for error. …”

Section: Factors Affecting Search Tasksmentioning

confidence: 99%

Human factors in aviation maintenance: Phase 1: Progress report.

Shepherd¹

1991

PsycEXTRA Dataset

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“…Measurements reported in the literature about visual search performance when the search time is varied, (i.e., the speed is changed) (Megaw, 1979) have indicated an exponential increase in the detection rate as the time available for inspection is increased, i.e., when the visual inspection is performed at a slower pace (Drury, 1973). The visual search process has also been modeled as either random or systematic (Morawski et al, 1992). In a random search process, any point of the search field can be inspected several times, whereas in a systematic inspection, a visual fixation cannot occur twice at the same point.…”

Section: Introductionmentioning

confidence: 98%

Training for Systematic Search Using a Job Aid

Koenig

Liebhold

Gramopadhye

1998

Proceedings of the Human Factors and Ergonomics Society Annual

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A dominant component of quality control, visual inspection can be broken down into two elements: visual search and decision-making. This study focuses on the search process. The search process has been mathematically described as random, systematic, or somewhere in between. Mathematical models and empirical studies have shown that the best performance in detecting defects during visual inspection results from the use of a systematic search strategy. For this study, a job aid that could potentially be used as an off-line training tool was developed to promote systematic visual search strategy. The job aid, a moving cursor on the viewing screen, was used to determine an optimal search speed or a range of optimal speeds for which the highest inspection accuracy could be achieved.

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The Optimum Speed of Visual Inspection Using a Random Search Strategy

Cited by 23 publications

References 10 publications

Theoretical issues in the design of visual inspection systems

Theoretical issues in the design of visual inspection systems

Human factors in aviation maintenance: Phase 1: Progress report.

Training for Systematic Search Using a Job Aid

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