Effect of MTBF mean time between failures on product reliability

MTBF means "Mean Time Between failures". Is a measure of a product (especially electrical products) reliability index.

With the attention of the country to improve the quality of products, more and more attention by the bidders. How to design a reasonable MTBF test scheme, how to verify MTBF and other problems are troubling many enterprises.

One, what is MTBF?

MTBF, also known as mean trouble-free operating time, is the average time interval between two adjacent failures, in the unit of "hours", and is an important reliability data to measure product life.

Two, MTBF common application products

Information products: computer, server, switch, monitor, TV, etc.

Rail transit: signal control system, braking system, etc.;

Medical instruments: ultrasonic percutaneous puncture locator, multifunctional therapeutic instrument, etc

Electrical and electronic: controller, camera and so on

Iii. Purpose of MTBF analysis:

1. Key countermeasures for high frequency failure parts and technical reform basis for parts life extension.

2. Calculated the life cycle of parts and made maintenance plans.

3. Selection of spot inspection objects and projects, setting and improvement of spot inspection benchmarks.

4, used to guide internal and external maintenance work allocation. According to the evaluation of the repair ability of the equipment in the company, the maintenance quality and equipment efficiency of the internal work shall be determined by the different types of equipment and operations

Insurance, as an important reference for maintenance outsourcing.

5. Set the standard of spare parts. The reserve items and basic inventory quantity of mechanical and electrical parts shall be judged according to the record analysis of MTBF, so that the inventory level reaches the economic condition.

6. As a reference basis for selecting the key points for improving maintenance technology and methods. In order to improve the operation rate of equipment, shorten the long time maintenance operations related to equipment shutdown and engineering adjustment and switch time. Therefore, it is necessary

The maintenance operation method shall be inspected, and the basic information such as the inspection items and the selection of priority order shall be based on the analysis record table of MTBF.

7. It is used to set the standard of estimated running time for equipment objects, and study the selection of maintenance operations and maintenance time standard. Set the standard of estimated time for maintenance schedule and select maintenance operations, considering equipment maintenance

The difference between the repetition period or standard time value and the actual maintenance time and the corresponding maintenance operation characteristics, so the MTBF analysis table is very necessary.

8. Reference for finishing and re-selecting key equipment or parts. The information of equipment parts modification project or friction deterioration recorded in the analysis record table of MTBF, as well as equipment drawing modification or pre-production, etc.

Engineering drawing management is made easier by being able to perform frequent analysis checks and prioritize management.

9. Set and revise operation standards and decide the assignment of responsibility for equipment maintenance business.

10. Provide technical data of reliability and maintainability design of equipment. Maintenance technology is important to collect technical information about the reliability and maintainability design of equipment based on the MTBF analysis table, in order to

Provide reference for design department in the design of equipment.

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