Reliability and technical services


The Zhaozhou Bridge dates back to the Sui Dynasty and has a history of over 1400 years, making it a model of reliability.

1、 Reliability service capability:

1. What is reliability?

Reliability: The ability of a product or system to complete specified functions under specified conditions and within a specified time is called reliability.

The products here can generally refer to any system, device, and component. The elements of product reliability definition are three 'regulations': 'specified conditions', 'specified time', and 'specified functions'.

1.1 Prescribed conditions: including environmental and working conditions during use. For example, the reliability performance of a car of the same model is not the same when driving on highways or rough mountain roads. To discuss the reliability of a product, it is necessary to specify the specified conditions.

1.2 Required time: refers to the task time specified by the product. As the product task time increases, the probability of product failure will increase, while the reliability of the product will decrease. Therefore, discussing product reliability cannot be separated from the specified task time. For example, the probability of a car malfunctioning is significantly lower when it first leaves the factory compared to when it has been in use for 5 years.

1.3 Prescribed functions: refer to the necessary functions and technical indicators specified by the product. The number of required product functions and the level of its technical indicators directly affect the level of product reliability indicators. For example, the main functions of an electric fan include rotating blades, shaking the head, and timing. Whether the specified functions are all required, or whether only the rotating blades are needed to rotate and blow, the reliability indicators obtained vary greatly.

2. What is reliability testing?

Reliability test: A general term for various tests conducted to understand, evaluate, analyze, and improve the reliability of a product.

Classification of reliability tests: According to the purpose of the test (GJB450A): mainly divided into reliability engineering tests and reliability statistical tests,

2.1 Reliability engineering tests: mainly including reliability development tests, reliability growth tests, and environmental stress screening tests. Their main purpose is to stimulate defects, that is, to discover various defects in product design, components, components, raw materials, and processes, and take measures to improve and eliminate them, in order to improve reliability.

2.2 Reliability development test: mainly applied in the early stage of research and development, with the aim of discovering product design defects and improving the inherent reliability of the product;

2.3 Reliability growth test: usually applied in the middle and later stages of research and development to discover product design defects and increase product reliability to specified standards;

2.4 Environmental stress screening test: usually applied in the production stage to detect and eliminate early faults.


3. Reliability statistical test: mainly including reliability identification test and reliability acceptance test, their main purpose is to verify indicators, that is, confirm whether they meet the requirements of reliability quantitative indicators, such as MTBF, service life, etc.

3.1 Reliability appraisal test: mainly used in the later stage of research and development before finalization, with the purpose of evaluating whether the product reliability level meets the design requirements;

3.2 Reliability acceptance test: mainly used in the production stage to evaluate whether the reliability level of the product after production meets the requirements.

MTBF: Mean Time Between Failures, also known as 'Mean Time Between Failures' in English. It is a reliability indicator that measures a product (especially an electrical product), measured in hours. Specifically, it refers to the average working time between two adjacent faults, also known as the average fault interval. It is applicable to repairable products, and also stipulates that the ratio of the cumulative working time of the product during the total usage phase to the number of failures is MTBF. For example, disk array products generally have an MTBF of no less than 50000 hours.

Service life: The period during which a product maintains its safe working ability under the conditions specified by the designer or manufacturer is called its service life. This includes the time required for necessary repairs and maintenance. The product has exceeded its service life and is no longer safe to continue using, with some potential accidents. For example, the service life of a car is generally 15 years.

4. What is environmental testing?

Environmental testing: Expose electronic and electrical products (including materials) to natural or simulated environments to evaluate the performance of devices, equipment, and systems under actual storage, transportation, and usage environmental conditions.

5. What is the difference between environmental testing and reliability testing?

Environmental testing is more focused on verifying the design objectives of products, mainly in terms of transportation, storage, and work environments. However, environmental testing can only say that the product can work in specific environments and does not necessarily demonstrate its ability to work continuously under specific conditions for a long time. In other words, environmental testing cannot tell us the reliability level of the product.

2、 Technical service capabilities:

1. Design and production of tooling fixtures:





2. Development of non-standard test methods:

Tailored high repeatability, high consistency, and specific executable test methods

3. Consultation and training:

Provide professional technical, standard and normative consulting and training services for enterprises, assist technical personnel in mastering relevant technical knowledge, and quickly improve their technical level.

4. Standardized services:

Collect market feedback, establish environmental profiles, assist enterprises in improving product environmental testing and reliability standardization.