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Quality management method

A quality management and variance technology, applied in the direction of instruments, variable sampling systems, control/regulation systems, etc., can solve the problem of batch production process monitoring and other problems, and achieve the effect of improving the monitoring level and improving production efficiency

Inactive Publication Date: 2010-07-28
SEMICON MFG INT (SHANGHAI) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no continuity between these sample data groups, so when analyzing and calculating these sample data, the control circle obtained by the original method will not be able to effectively monitor the batch production process

Method used

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Embodiment Construction

[0025] The product is either qualified or unqualified, that is to say, for the test result of the same product, there are two possible mutually opposite test results. Wherein, the probability of obtaining the substandard product satisfies a binomial distribution (binomial distribution) statistically. Wherein, the binomial distribution is a probability distribution statistically describing the regularity of this discrete random event with only two mutually exclusive outcomes. Specifically, the number of unqualified products is D, the total number of products is n, and P is the probability of qualified products, which has the following relationship:

[0026] P { D = x } = n x p x ( 1 - p ) ...

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Abstract

The invention discloses a quality management method, which comprises the following steps: sampling sample data in a grouping mode, wherein data in different groups does not have continuity; and according to the sample data, respectively setting a control limit between groups and a control limit in each group. According to the characteristic that the sample data in different groups does not have the continuity in the batch processing production process, the control limit between groups and the control limit in each group are respectively set for the sampled sample data, so a phenomenon that the conventional quality management method cannot monitor the batch processing production process or a fault is generated in the monitoring process is improved, the level of monitoring the batch processing production process is effectively improved and the production efficiency is improved.

Description

technical field [0001] The invention relates to a quality management method, in particular to a quality management method for products in batch production. Background technique [0002] In the production department of an enterprise, a large number of products are produced or processed every day. The performance and quality of the product are related to the lifeline of the enterprise. It is particularly important to monitor, detect and analyze the product quality in time. The quality management method is a method to realize the control of production by detecting and analyzing the product quality. Among them, the relevant parameter data of product quality is often collected, and the collected parameter sample data is analyzed by statistical principles. Find problems in time, so as to realize the perfection and improvement of production conditions or processes. [0003] In the process of monitoring product quality, products can be divided into two types: "qualified products" a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B21/02
Inventor 杨斯元简维廷
Owner SEMICON MFG INT (SHANGHAI) CORP
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