T. Nakajo et al. investigated the relationships between status of work management systems and the types of human error occurring under the systems, and found many companies face to the errors that occurred when the worker did not follow the operation standard, and performance evaluation and training focusing individual workers are effective to prevent the errors. This paper focused on the method of educating/training/motivating workers and the errors that occurred when the worker did not follow the operation standard, and identified the relationships between them based on the survey of Deming Prize awarded companies The study shows that the methods of educating/training/motivating workers have effects on the types and occurrence rate of errors, and the degree of the effects depends on the conditions of workshop, e. g. , status of automation and standardization, percentage of temporal employee, and number of product types.
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