Quality management device and method for controlling same

Abstract

Provided is a quality management device, comprising: a facility information acquisition means for acquiring data of a facility state value which is observed when processing a product with a manufacturing facility and which represents a state of the manufacturing facility; and a product information acquisition unit which acquires data of a product state value which is measured from the product which is processed by the manufacturing facility and which represents a state of the product. When a given product is assessed to be defective, the quality management device assesses, by a comparison with a good quality distribution of the product state value, whether the product state value of the defective product is an anomalous value, and assesses, by a comparison with a good quality distribution of the facility state value, whether the facility state value when the defective product is processed is an anomalous value. If it is assessed that either the product state value or the facility state value relating to the defective product is an anomalous value, the quality management device determines that a fault has occurred with the manufacturing facility.

Description

technical field [0001] The present invention relates to a technique for managing the quality of a production line. Background technique [0002] In production lines that are becoming increasingly automated and labor-saving, inspection devices are installed in the middle or final process of the production line to automatically detect defective products or classify defective products. In addition, an attempt is also made to infer the main cause of failure from the inspection results of the inspection equipment, and to make use of it in quality control and maintenance of production equipment. [0003] In such a quality management system, if the judgment criteria for inspection and the management criteria for quality are not properly set, the efficiency of the production line may decrease. The reason for this is that, for example, if the standard is too loose, it will lead to an increase in defective products, the burden of visual inspection, and the cost of discarding non-conf...

AI Technical Summary

Problems solved by technology

[0003] In such a quality management system, if the inspection criteria and quality management criteria are not properly set, the efficiency of the production line may decrease.

The reason for this is that, for example, if the standard is too loose, it will lead to an increase in defective products, the burden of visual inspection, and the cost of discarding non-conforming products. Conversely, if the standard is too strict, it will lead to increased , there will be situations where qualified products are unnecessarily excluded or the production equipment is abnormally detected by mistake, and the production line is stopped in vain due to abnormality

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