What is the general procedure for FMEA failure analysis? What are the causes of failure?

Date：2022-03-22 13:59:14Views：1105

What is the general procedure for FMEA failure analysis? FMEA failure mode analysis, as a special tool for preventive measures, its key purpose is to detect and comment on the potential invalidity and adverse effects in the whole process of goods / products; Look for countermeasures that can prevent or reduce potential inefficiency, and constantly improve them. According to FMEA, we can identify and evaluate the shortcomings, methods and hazards that will exist in the design scheme or engineering project, and clarify the improvement countermeasures that can eliminate or reduce the potential invalidity, so as to prevent it in the future, minimize the cost of various shortcomings and ensure the integrity and characteristics of IC electronic components.

General procedure flow of FMEA failure analysis:

1. Drawing flow chart and risk assessment.

2. Clarify the analysis level of the whole process.

3. Establish the quality and dimensional tolerance specified in the whole process.

4. Make a block diagram of the production process.

5. For each production and processing process, give examples of poor methods.

6. Sort out the bad ways that lead to the bad reasons, and select them as the bad ways to reflect on the other half.

7. Use Plato to analyze the causes of bad.

8. The way and reason of the defect shall be included in the FMEA report.

9. Take the hazard level, generation frequency, detectability and understanding level of machinery and equipment as the criteria, and carry out grade evaluation on the defect mode, which is divided into I, II, III and IV.

10. Estimate the serious consequences of poor performance, the probability of occurrence and today's detectability, and calculate the RPN.

11. Establish how to improve serious consequences, probability and detectability.

12. Implement improvement plan.

13. Collect statistical data, implement improvement and determine the actual effect.

14. Revise the FMEA document and rearrange the RPN according to the actual effect of improvement.

15. If necessary, start the new improved circulation system from step 12.

FMEA failure reason:

To study the failure, we must first get the real situation of the failure, such as the location of the failure, the time of occurrence, the failure mode, the failure reason, the impact of the failure, the failure correction method, the repair method and the repair cost.

The failure cause is the physical and chemical cause of failure, that is, the cause of failure mode, such as:

Failure mode: fracture

Failure causes: transgranular fracture, intergranular fracture, brittle fracture and ductile fracture

Failure analysis process and method

The procedure of failure analysis is:

1. Collect raw data

2. Determine failure mode

3. Study the cause of failure

4. Verify and confirm the cause of failure

5. Propose preventive measures

6. Continuous control

The above is the general procedures and failure causes of FMEA failure analysis compiled by the core detection team. I hope it will be helpful to you. Chuangxin testing is a professional testing organization for electronic components. At present, it mainly provides integrated circuit testing services such as capacitance, resistance, connector, MCU, CPLD, FPGA, DSP and so on. Specializing in functional testing of electronic components, incoming appearance testing of electronic components, anatomical testing of electronic components, acetone testing, X-ray scanning testing of electronic components and RoHS component analysis testing. Welcome to call, we will serve you wholeheartedly!