Early failure rate change-point recognition method based on monitoring Weibull shape parameter

Abstract

The invention provides an early failure rate change-point recognition method based on monitoring Weibull shape parameters. The method comprises: step one, establishing a related early failure basic database; step two, establishing an early failure rate change point model of a product; step three, establishing an early failure rate change-point monitoring index; step four, determining relevant design parameters of a CUSUM control chart for identifying the early failure rate change point; step five, drawing a control chart; step six, identifying an early failure rate change point; and step seven, carrying out a result analysis. Therefore, an objective of identifying the early failure change point of the product is achieved; a support basis is provided for making an in-plant life test plan for an enterprise and determining an after-sales quality assurance policy; and thus the product quality and the production efficiency of the enterprise are improved.

Description

Technical field [0001] The invention provides an early failure rate change point identification method based on monitoring Weibull shape parameters, which belongs to the field of quality management. Background technique [0002] Early product failure will have a strong negative impact on customer satisfaction, and at the same time will significantly increase the cost of after-sales warranty service. In the increasingly fierce market competition environment, due to cost and time constraints, there are potential defects that cannot be detected in production, which reduces the reliability of products after batch production, which is manifested by higher early failure rates and various types of early use stages. Early failures have caused serious consequences such as casualties, environmental pollution problems, customer loss, warranty claims, emergency resource mobilization costs, insurance costs and other serious consequences. [0003] Statistically, an important rule of product fai...

AI Technical Summary

Problems solved by technology

[0004] At present, studies on early failure based on reliability tests or using failure data are mostly used for failure rate modeling and rarely focus on early failure rate change points, and ignore an important difference between the early failure stage and the accidental failure stage of the product. Distinguished by the difference of Weibull shape parameters, thus ignoring the analysis and utilization of the critical moment of early failure rate change point

Images