Generally speaking, the test conducted to evaluate and analyze the reliability of electronic products is called reliability test. It is to predict the quality from the delivery of products to the end of their service life. After selecting the environmental stress with high similarity to the market environment, set the degree and application time of environmental stress. The main purpose is to correctly evaluate the reliability of products in a short time as possible.

After the product is designed and formed, the product reliability test must be carried out. The product reliability test is a necessary step to stimulate the potential failure mode, put forward improvement measures, and determine whether the project or system meets the predetermined reliability requirements. The basic principle of reliability test is shown in the figure.

Reliability test is to determine whether the products transferred to mass production through reliability identification test meet the specified reliability requirements under specified conditions, and to verify whether the reliability of products decreases with the changes of process, tooling, workflow, parts quality and other factors during mass production. Only through these, can the product performance be trusted and the product quality be excellent.

The purpose of electronic product reliability test usually includes the following aspects:

1. In the development stage, it is used to expose the defects of trial products in all aspects and evaluate whether the product reliability reaches the predetermined index;

2. Provide information for monitoring the production process in the production stage;

3. Reliability appraisal or acceptance of finalized products;

4. Expose and analyze the failure rules, relevant failure modes and failure mechanisms of products under different environments and stress conditions;

5. In order to improve product reliability, formulate and improve reliability test scheme, and provide basis for users to select products.

Methods and classification of reliability test for electronic products

1、 If divided by environmental conditions, it can be divided into simulation test and field test under various stress conditions;

2、 Divided by test items, it can be divided into environmental test, life test, accelerated test and various special tests;

3、 If it is divided according to the test purpose, it can be divided into screening test, identification test and acceptance test;

4、 If divided according to the nature of the test, it can also be divided into destructive test and non-destructive test.

The commonly used classification method is to classify reliability tests into five categories:

A. Environmental test B. life test C. screening test D. field service test E. qualification test