High-confidence coefficient statistical inference and confirmation method for limited quantity product performance failure rates

Abstract

The invention discloses a high-confidence coefficient statistical inference and confirmation method for limited quantity product performance failure rates. The method comprises the following steps of:1, carrying out small sample sampling to obtain performance data; 2, estimating a limited quantity product performance parameter mean value and a standard deviation and quantifying uncertainties: (1)determining reliabilities (as shown in the specification) of binomial distributions, (2) determining relative uncertainties estimated by the reliabilities (as shown in the specification) of the binomial distributions, and (3) estimating performance parameter values and quantifying uncertainties of the performance parameter values; and 3, estimating a limited quantity product performance failure rate (number). The method is an effective method capable of reducing the product performance checking and testing number, correctly judging whether limited quantity product performance failure rates (numbers) achieve stipulated requirements or not and ensuring that the judging results have relatively high credibility in production, acceptance, storage and using of current limited quantity products.

Description

technical field [0001] The invention relates to a statistical method, in particular to a high-confidence statistical inference and confirmation method for the performance failure rate of a limited number of products. Background technique [0002] At present, for a limited number of products in the process of production, storage and use, it is usually necessary to know and master the product qualification rate of these products after production and delivery acceptance, and whether the product qualification rate occurs during storage and use. Whether it meets the conditions for decommissioning and scrapping. However, due to the limitation of inspection cost and technical conditions, it is often necessary to use small sample methods for sampling inspection, testing and analysis and evaluation. [0003] Especially for products that must pass destructive tests to obtain key performance data, based on which their performance and quality can be analyzed and evaluated, such as nucl...

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Problems solved by technology

[0004] However, at present, whether it is the MIL-STD-105 jointly formulated and adopted by the United States, the United Kingdom, and Canada, or the ISO-2859 named and used by the International Standards Organization ISO, as well as the JIS-2-9015 currently used by Japan and the current use of my country's promulgated The GB2828-87 of GB2828-87 is based on the strict characteristics of the OC curves of various sampling plans to formulate sampling plans, and it is necessary to determine whether batch products are accepted or rejected according to the number of acceptances and rejections determined by the sampling plan; and limited quantities of products How big is the performance failure rate (number) in the product, and the number of sample failures obtained from the sampling plan and its test results, to judge the correctness and credibility of the performance failure rate (number) in a limited number of products, it is still not possible effectively given

Especially for military products and batch products, under the condition that the sampling inspection ratio is relatively high, the inspection and testing not only require a lot of manpower, material resources and financial resources, but also judge according to the sampling results obtained by the existing mature sampling plan. The risk of correctness of the overall performance failure rate (number) of the product is still relatively large

In addition, there are no relevant research and reports on the new method of small sample sampling inspection based on a limited number of products at home and abroad.

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