Automatic quality control method for production line and apparatus therefor as well as automatic quality control program

An automatic quality control apparatus for a production line, comprising:

• a production line configured to produce products;
• a first database configured to store a plurality of production condition data for producing the products and product quality data indicating quality of the products;
• a monitoring section configured to monitor a plurality of production condition data for product the products from the production line and further monitor the product quality data indicating the quality of the products, to store them in the first database;
• an extraction section configured to check the production condition data to detect whether or not there is an event which deteriorate the quality of products, and to extract a quality deteriorating factor which causes the quality deteriorating event and improvement content of production conditions regarding the quality deteriorating factor on the basis of the quality deteriorating event and the production condition data;
• a second database configured to store, in advance, improvement examples for the quality deterioration factor;
• a validity confirming section configured to confirm the validity of the quality deteriorating factor and the improvement content by collating the quality deteriorating factor and the improvement content extracted by the extracting section with the improvement examples pre-stored in the second database;
• and
• a feedback control section configured to revise the production conditions for the production line in accordance with the improvement content.

An automatic quality control program for a production line, comprising:

• monitoring a plurality of production condition data for manufacturing color cathode ray tubes from a production line and product quality data indicating quality of manufactured products;
• storing the production condition data and product quality data thus monitored in a database;
• checking the production condition data to detect whether or not there is an event which deteriorates the quality of products;
• extracting, if a quality deteriorating event is detected, a quality deteriorating factor which causes the quality deteriorating event and improvement content of production conditions against the quality deteriorating factor on the basis of the quality deteriorating event and the production condition data;
• collating the quality deteriorating factor and the improvement content with improvement examples pre-stored for possible quality deteriorating factor and confirming the validity of the quality deteriorating factor and the improvement content;
• and
• changing the production conditions for the production line in accordance with the improvement content.