Statistical process control method and apparatus

A technology of statistical process control and production process, applied in the direction of electrical program control, comprehensive factory control, comprehensive factory control, etc., can solve the problems of system instability, no alarm, unable to meet production needs, etc., to improve work efficiency and simplify classification Effect
CN101477358AInactive Publication Date: 2009-07-08SEMICON MFG INT (SHANGHAI) CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SEMICON MFG INT (SHANGHAI) CORP
Publication Date
2009-07-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a statistical process control method and a statistical process control device applying the method. The method comprises the following steps: acquiring initial data to be analyzed during production, dividing the initial data into non-continuous distribution data, autocorrelation data, nonnormal distribution data and normal distribution data, determining the control limit according to different data types respectively, and monitoring and / or analyzing the production process according to the determined control limit. The statistical process control method simplifies classification of control charts through data classification, solves the problem of calculating the control limit of limited data points subjected to normal distribution and nonnormal distribution, realizes monitoring of a complex system with a large quantity of parameters which can not be realized in the prior art, saves the data processing time, and improves the work efficiency.
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Description

technical field

[0001] The invention relates to a statistical process control method and device. Background technique

[0002] In the production department of an enterprise, a large number of products are produced or processed every day, and the performance and quality of the product are related to the lifeline of the enterprise. In order to ensure product quality, it is necessary to monitor, detect and analyze the production process in time. Statistical Process Control (SPC) is a tool for statistics and control of the production process by means of statistics. In the production process, statistical process control tools are widely used to collect and analyze the parameters in the production process, and provide them to engineers in the form of statistical signals, such as calculating the control boundary of the control chart for the sample data collected in the production process , make a control chart, histogram for analysis; or use the control circle in the control char...

Claims

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