The Effect of Visual Search Patterns of Non-Geometric Shape Inspection Tasks
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Abstract
Product inspection is an important step and a major quality control component for many industrial tasks. Visual inspection is based on the use of the human eye to search surface defects. The objective of this research was to compare three types of visual search patterns, investigate and identify differences between different pattern of visual search in terms of performance measures to identify an effective means of significantly the inspector for non-geometric shape inspection tasks. The random search pattern, vertical search pattern and horizontal search pattern were used to instruct participants on visual inspection. Participants were provided information about number of defect per inspection tasks, provided with verbal description and graphical of the defect types, visual search method of each groups and rotation method for inspected. Then, the trials of visual inspection. The performance of visual inspections measured by the mean search time and the percentage of defects detected for each
visual search patterns. Analysis of one-way ANOVA both indicated a significant treatment effect, (F (2, 15) = 56.425, p < 0.05), (F (2, 15) = 15.943, p < 0.05). Fisher’s Protected LSD Comparison procedure was conducted to determine what differences, least significant difference multiple comparison analysis indicated that the performance of the horizontal search was significantly better than that of the random search and vertical search. One reason for this might be that the horizontal search pattern was a systematic search method that covered the total inspection area.
Based on the results of this study, the horizontal search pattern was the appropriate pattern of visual search of complicated shapes or non-geometric shapes, it is
recommended that horizontal search pattern be used in the visual search of inspectors for non-geometric shape inspection tasks.
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