Potential Failure Mode Analysis, Potential Failure Mode and Consequences Analysis

The analysis of potential failure modes and consequences is as follows:

Failure Mode and Effects Analysis i.e"Analysis of potential failure modes and consequences", or simply FMEA.

FMEA is a systematic activity that analyzes the subsystems and parts that make up the product and each process one by one in the product design stage and process design stage, finds out all potential failure modes, and analyzes their possible consequences, so as to take necessary measures in advance to improve the quality and reliability of the product.

Core"Focus: Prevention - Dealing with the expected failures, their causes and consequences Impact.

Main work: Risk assessment - the consequential effects of potential failure modes.

FMEA begins with product design and manufacturing process development activities and guides implementation throughout the product lifecycle.

An inductive analysis method that analyzes all possible failure modes of each product in the system and all possible effects on the system, and classifies each failure mode according to its severity, detection difficulty and frequency.

Purpose: To make changes to a product or process easily and cost-effectively, thereby mitigating post-event crisis modifications. Find measures to avoid or reduce the occurrence of these potential failures.

Benefits: Point out the weaknesses of design reliability and propose countermeasures; According to the required specifications, environmental conditions, etc., the experimental design or simulation analysis is used to improve the inappropriate design in real time and save unnecessary losses; Effective implementation of FMEA can reduce development time and development costs.

In the early stage of the development of FMEA, design technology was considered, but later development, in addition to the use of design time, manufacturing engineering and inspection engineering can also be applied. Tuansun improves the quality, reliability and safety of its products.

How to Perform Potential Failure Mode and Effect Analysis?

1. Document the product or process function. The purpose of this step is to outline how a product or process will work in the order in which it performs functions.

2. Determine under what circumstances these functions will fail (failure mode).

3. Determine the importance of the failure result; In both steps, the team carefully considers the negative objections and tests which part of the product or process is most likely to fail, how it occurs, and what the severity of the consequences of the failure are.

4. Confirm the cause of failure and the probability of occurrence, and don't invest too much energy in those failures that rarely occur.

5. Make a pure list of existing methods for detecting and preventing failures and the probability of their effectiveness. In this step, the team assigns a level of awareness to the product and process history before assessing and prioritizing the risks involved.

6. Assess the risk of each failure.

7. Identifying the appropriate actions to deal with the highest risk failures is the most important step. At this step, we can derive the appropriate actions that need to be taken to reduce or remove the previously identified potential failures. Without this step, all other steps are useless.

Failure mode and effect analysis of potential disknowledge is intended to be a "beforehand" act, not a "post-the-fact" act. The purpose of FMEA is to identify, assess and ultimately reduce potential risks. Since it is a potential risk, you must carry out it before the finished product and the process is executed, otherwise the FMEA will lose its meaning.

1.Import and update timing is missing.

Potential Failure Mode and Effect Analysis is a dynamic activity, in other words, FMEA is not eternal, it is moderately upgraded. But in the objective facts, some companies you looked at it 5 years ago, and after 5 years, it is still like that, and the only change may be the change in the header. It cannot be denied that some companies' products and processes are well planned, and there are almost no changes or product quality problems in the life cycle, but this kind of probability is basically impossible to find.

2.The task is overdue.

Time is of the essence, and all new project development and design have a time frame. FMEA activities are also subject to this standard, and exceeding the connection point regulations may lead to higher costs and even market outflows.

3.Personnel. People are the main actors of professional theme activities, and FMEA theme activities must be managed by people, implemented and evaluated.

This must involve the joint efforts of the company's executives, FMEA teams, and technical personnel. The support of managers determines the depth of FMEA, the cooperation of the team determines the completion of the FMEA, and the work ability of the personnel determines the quality of the FMEA-themed activities.

4.Manner. If you have the right people but not the law, you will not be able to do things.

As mentioned above, in order to do a good FMEA, the FMEA team and staff with the ability to work are indispensable, but if the method chosen is not good, the quality of the FMEA will be greatly affected. To put it bluntly: those who get the law get twice the result with half the effort, and those who don't get the law get twice the result with half the effort.

Only by complementing and integrating the shortcomings of the two can we do better.

The analysis of potential failure modes and segment cavity balance effects is an important method for reliability design. It's actually a combination of FMA (Failure Mode Analysis) and FEA (Failure Effects Analysis). It evaluates and analyzes all possible risks in order to build on them or reduce them to an acceptable level on the basis of prior art.

Since product failures may be related to design, manufacturing process, use, contractors and services, FMEA is subdivided into:

DFMEA: Design FMEA

PFMEA: Process FMEA

efmea: device FMEA

SFMEA: System FMEA

Design FMEA and process FMEA are the most commonly used.

Potential Failure Mode and Effect AnalysisIn the product design stage and process design stage, the subsystems and parts that make up the product are analyzed one by one, and the various processes that make up the process are analyzed one by one, all potential failure modes are found, and their possible consequences are analyzed, so as to take necessary measures in advance to improve the quality and reliability of the product. The benefits of FMEA are as follows:

1. Point out the weaknesses of design reliability and put forward countermeasures.

2. According to the required specifications, environmental conditions, etc., use experimental design or simulation analysis to improve the inappropriate design in real time to save unnecessary losses.

3. The effective implementation of FMEA can shorten the development time and development cost.

4. In the early stage of the development of FMEA, the design technology was considered, but in the later development, in addition to the use of design time, manufacturing engineering and inspection engineering can also be applied.

5. Improve the quality, reliability and safety of products.