Reliability Testing Overview
Reliability testing is an activity carried out to evaluate the functional reliability of a product under all circumstances of expected use, transportation or storage during a specified life period. It is to expose the product to natural or artificial environmental conditions and withstand its effects to evaluate the performance of the product under the environmental conditions of actual use, transportation and storage, and to analyze and study the impact of environmental factors and their mechanism of action.
By using various environmental test equipment to simulate high temperature, low temperature, high temperature, high humidity, and temperature changes in the climate environment, we can accelerate the reaction of the product in the use environment to verify whether it reaches the expected quality in R&D, design, and manufacturing. Target, thereby evaluating the product as a whole to determine product reliability life.
Reliability test classification.
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Software reliability testing
Software reliability is the ability of a software system to complete specified functions within a specified time and under specified environmental conditions. Generally, the reliability of a software system can only be measured by testing it.
Hardware reliability testing
Hardware reliability testing is also called product reliability evaluation, which refers to the product's ability to complete specified functions under specified conditions and within a specified time. During the design and application process, products are constantly affected by themselves and the external climate environment and mechanical environment, but they still need to be able to work normally. This requires testing equipment to verify them. This verification is basically divided into R&D tests and trial production tests. , three parts of mass production sampling inspection. Reliability tests include: aging test, temperature and humidity test, gas corrosion test, mechanical vibration test, mechanical impact test, collision test and drop test, dustproof and waterproof test, packaging pressure test and other environmental reliability tests.
Life test is a reliability test
Reliability testing is a means of investigating, analyzing and evaluating product reliability. The test results provide a basis for fault analysis, research on corrective measures, and judgment of whether the product meets the index requirements.
According to the methods and purposes used in reliability statistical tests, reliability statistical tests can be divided into reliability verification tests and reliability determination tests. Reliability determination tests are tests performed to determine reliability characteristics or their magnitude, and are usually used to provide reliability data. The reliability verification test is a test used to verify whether the reliability characteristic value of the equipment meets its specified reliability requirements. Reliability identification and acceptance tests are generally referred to as reliability verification tests.
Life test plays a role in reliability test
Life test is one of the most important and basic contents in reliability testing. It puts the sample under special test conditions and measures the distribution of the number of failures (losses) over time. Because failures occur in sequence, order statistics theory can be used to analyze life test data, thereby determining the life characteristics and failure distribution rules of the product, and calculating reliability indicators such as the product's failure rate and average life. In addition, the reasonable reliability screening process and conditions of the product can also be determined to further improve the basis for ensuring product quality.