Abstract:
This study aimed to investigate inspector's performance using training strategies. The
results could be concluded under two significant topics, which are the factors influencing the
inspector's performance and the comparison of the inspector's performance on detecting defects
based on feedback and feedforward training strategies. The trainings were conducted with complex
inspection using visual inspection program in 3D simulation. The defects, defined as X and V, were
mixed amongst alphabets in the backgrounds set in various forms and sizes. The background colors
were white, yellow, red and blue. The results revealed that the white background resulted in the
highest performance of inspectors at a significant level of .05. The horizontal search combined with
the systematic rotation was the most effective method because this covered all area and conformed
to the search pattern theory stating that the systematic search which has the eye moving from left to
right or top to bottom provides the most accurate and fast inspection. According to the study, the
training provided to inspectors helped increase their performance, i.e higher detection accuracy and
faster speed. Thus, information given during the either feedback or feedforward training is the
means to increase visual inspector's performance, Feedforward training was the most effective
method for visual inspection training in 3D work based on average search time and search accuracy
and was significantly different at the significant level of .05 and .01, respectively. The last
experiment aimed to improve an inspector's performance on the training through 3D model using
motivation technique. The subjects were divided into 3 groups; a control group, a feedback training
group, and a feedback training with motivation group. The subjects participated in the last group
would get money as a reward when thay detected and certain amount of money was deducted for
each defect they missed as a punishment during the test with 3D model software. According to the
experiment, the inspector's performance of reward group in terms of speed and accuracy in
detecting defects in training increased at the significance level of .01 and .05, respectively.