Risk assessment method and system in FMEA analysis
Patent Information
- Application Number
- CN202510399943.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2025-07-18
AI Technical Summary
The existing FMEA analysis still has functional problems during the product design stage, affecting product quality.
By conducting failure analysis of various functions in the product structure tree of the target product, adding prevention, detection and response measures, and determining the AP level based on the frequency of use, controllability and the severity of the failure consequences, and taking timely optimization measures to reduce the impact of functional failure.
The product quality has been improved, and effective measures have been taken to mitigate the impact of failure and improve product reliability and quality by comprehensively considering the causes, patterns and consequences of failure.
Smart Images
Figure CN120337536A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of FMEA analysis, and particularly to a risk assessment method and system in FMEA analysis. Background Art
[0002] Failure Mode and Effects Analysis (FMEA) of product design is a systematic activity that analyzes each subsystem and part of a product and each process step of a process one by one during the product design stage and process design stage, finds 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. Currently, there are still functional problems with the product after FMEA analysis, which affects the product quality. Therefore, FMEA analysis still needs to be improved. Summary of the Invention
[0003] The purpose of this application is to provide a risk assessment method and system in FMEA analysis to improve product quality.
[0004] To achieve the above purpose, this application provides the following solutions:
[0005] In the first aspect, this application provides a risk assessment method in FMEA analysis, including:
[0006] Performing failure analysis on each function in the product structure tree of the target product to obtain the failure causes, failure modes, and failure consequences of each function; each lower-level node of each component in the product structure tree includes a function.
[0007] Adding control measures to the failure causes, failure modes, and failure consequences, where the control measures include preventive measures, detection measures, and response measures;
[0008] After applying the control measures to the functions after failure analysis, determining the first AP level of each function according to the usage frequency, controllability, and severity of the failure consequences of each function.
[0009] Optionally, after determining the first AP level of each function according to the usage frequency, controllability, and severity of the failure consequences of each function, the risk assessment method in FMEA analysis further includes: when the first AP level of a function is greater than the set level, adding optimization measures to the function.
[0010] Optionally, the optimization measures include the preventive measures, the detection measures, and the response measures.
[0011] Optionally, after adding optimization measures to the function when the first AP level of the function is greater than the set level, the risk assessment method in FMEA analysis further includes:
[0012] Update the controllability of the function after adding optimization measures;
[0013] Determine the second AP level of the function after adding optimization measures according to the usage frequency, updated controllability and severity of failure consequences of the function after adding optimization measures.
[0014] Optionally, determine the first AP level of each function according to the usage frequency, controllability and severity of failure consequences of each function, specifically including:
[0015] According to the AP level definition, determine the first AP level of the function based on the corresponding relationship between the usage frequency, controllability and severity corresponding to the function and the AP level; the AP level definition is used to determine the corresponding relationship between the usage frequency, controllability and severity and the AP level.
[0016] Optionally, determine the second AP level of the function after adding optimization measures according to the usage frequency, updated controllability and severity of failure consequences of the function after adding optimization measures, specifically including:
[0017] According to the AP level definition, determine the second AP level of the function after adding optimization measures based on the corresponding relationship between the usage frequency, updated controllability and severity corresponding to the function after adding optimization measures and the AP level.
[0018] Optionally, after determining the second AP level of the function after adding optimization measures according to the usage frequency, updated controllability and severity of failure consequences of the function after adding optimization measures, the risk assessment method in the FMEA analysis further includes: visually displaying the first AP level or the second P level of each function after failure analysis.
[0019] Optionally, after determining the first AP level of each function according to the usage frequency, controllability and severity of failure consequences of each function, the risk assessment method in the FMEA analysis further includes: outputting an FMEA analysis report.
[0020] In a second aspect, the present application provides a risk assessment system in FMEA analysis, including:
[0021] A failure analysis module, configured to perform failure analysis on each function in the product structure tree of the target product to obtain the failure causes, failure modes and failure consequences of each function; each lower-level node of each component in the product structure tree includes a function;
[0022] A measure application module, configured to add control measures to the failure causes, failure modes and failure consequences, and the control measures include preventive measures, detection measures and response measures;
[0023] The first AP level determination module is used to determine the first AP level of each function according to the usage frequency, controllability, and severity of the failure consequence of each function after applying the control measures to the functions after failure analysis.
[0024] Optionally, the first AP level determination module is further used to input the usage frequency band, controllability, and severity of the failure consequence of the function through the operation interface.
[0025] According to the specific embodiments provided by the present application, the present application discloses the following technical effects:
[0026] The present application provides a risk assessment method and system in FMEA analysis. It not only adds preventive measures to the failure causes, detection measures to the failure modes, but also adds response measures to the failure consequences. By the response measures, the failure is contained or corrected, the impact of the failure is mitigated, and the product quality is improved. In addition, when evaluating the AP level, considering the influence of the controllability of the function on the AP level can take timely measures to reduce the impact of function failure and further improve the product quality. Description of the Drawings
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0028] Figure 1 It is a schematic flowchart of a risk assessment method in FMEA analysis provided by an embodiment of the present application;
[0029] Figure 2 It is a schematic diagram of the functional modules of a risk assessment system in FMEA analysis provided by another embodiment of the present application. Detailed Embodiments
[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.
[0031] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below in conjunction with the drawings and specific embodiments.
[0032] The present application provides a risk assessment method in FMEA analysis, as Figure 1As shown, a risk assessment method in FMEA analysis includes:
[0033] Step 101: Conduct failure analysis on each function in the product structure tree of the target product to obtain the failure causes, failure modes, and failure consequences of each function; each lower-level node of each component in the product structure tree includes a function.
[0034] Step 102: Add control measures to the failure causes, failure modes, and failure consequences. The control measures include preventive measures, detection measures, and response measures.
[0035] Step 103: After applying the control measures to the functions after failure analysis, determine the first AP level of each function according to the usage frequency, controllability, and severity of the failure consequences of each function.
[0036] Among them, step 103 specifically includes: According to the AP level definition, determine the first AP level of the function based on the corresponding relationship between the usage frequency, controllability, and severity corresponding to the function and the AP level; the AP level definition is used to determine the corresponding relationship between the usage frequency, controllability, and severity and the AP level.
[0037] In an exemplary embodiment, the usage frequency, controllability, and severity of the failure consequences of each function in step 103 are all user input values.
[0038] Among them, after step 103, the risk assessment method in the FMEA analysis further includes: When the first AP level of a function is greater than the set level, add optimization measures to this function.
[0039] The optimization measures include the preventive measures, the detection measures, and the response measures.
[0040] In this application, control measures can be taken for the failure causes, failure modes, and failure consequences during risk analysis. The descriptions of the three types of measures are as follows:
[0041] 1) Preventive measures: Preventive control methods taken before the failure occurs to reduce the probability of failure occurrence.
[0042] 2) Detection measures: Detection methods taken when or after the failure occurs to detect the failure in a timely and accurate manner.
[0043] 3) Response measures: Containment or corrective measures taken after the failure occurs to mitigate the impact of the failure.
[0044] The above three types of control measures can all be divided into two types:
[0045] 1) Functions or attributes possessed by the product itself, such as the self-prevention error function, self-diagnosis function, and self-response function of the product. These measures are ultimately reflected in the structure and functions of the product.
[0046] 2) Methods applied externally to the product, such as Computer Aided Engineering (CAE), testing, and maintenance methods, which are ultimately reflected in the company's operating standards.
[0047] Combining the above three types of measures, evaluate the controllability C of each function. Define the AP level by integrating the severity S, frequency F, and controllability C, and visually display the AP level distribution. The controllability C specifically refers to the comprehensive effectiveness of preventive measures, detection measures, and monitoring measures. The controllability is a user input value.
[0048] Among them, S is divided into 4 levels: 0 - 3; F is divided into 5 levels: 0 - 4; C is divided into 4 levels: 0 - 3.
[0049] When the first AP level of a function is greater than the set level, mark the function in the function list and display the marking effect in the product structure tree. When the second AP level after applying the optimization measures to the function is less than or equal to the set level, the marking effect is no longer displayed in the product structure tree.
[0050] When the first AP level of a function is greater than the set level, after adding optimization measures to the function, the risk assessment method in the FMEA analysis further includes: updating the controllability of the function after adding the optimization measures; determining the second AP level of the function after adding the optimization measures according to the usage frequency, updated controllability, and severity of the failure consequence of the function after adding the optimization measures.
[0051] Determining the second AP level of the function after adding the optimization measures according to the usage frequency, updated controllability, and severity of the failure consequence of the function after adding the optimization measures specifically includes: based on the AP level definition, determining the second AP level of the function after adding the optimization measures according to the corresponding relationship between the usage frequency, updated controllability, and severity corresponding to the function after adding the optimization measures and the AP level.
[0052] After determining the second AP level of the function after adding the optimization measures according to the usage frequency, updated controllability, and severity of the failure consequence of the function after adding the optimization measures, the risk assessment method in the FMEA analysis further includes: visually displaying the first AP level or the second P level of each function after the failure analysis.
[0053] After determining the first AP level of each function according to the usage frequency, controllability, and severity of the failure consequence of each function, the risk assessment method in the FMEA analysis further includes: outputting an FMEA analysis report.
[0054] The FMEA report includes: part name, part function, part characteristics, failure consequences, failure modes, failure causes, preventive measures, detection measures, response measures, and the first AP rating. If there is optimized wording, the FMEA report also includes: optimized wording and the second AP rating.
[0055] This application provides a risk assessment method and system in FMEA analysis. Not only are preventive measures added to the failure causes, detection measures added to the failure modes, but also response measures are added to the failure consequences. By means of the response measures, the failure is contained or corrected, the impact of the failure is mitigated, and the product quality is improved. Additionally, when evaluating the AP rating, the influence of the controllability of the function on the AP rating is considered, enabling timely measures to be taken to reduce the impact of function failures and further improving the product quality.
[0056] Based on the same inventive concept, the embodiments of this application also provide a risk assessment system in FMEA analysis for implementing the above-mentioned risk assessment method in FMEA analysis. The implementation solutions provided by this system for solving problems are similar to the implementation solutions described in the above method. Therefore, the specific limitations in one or more of the following embodiments of the risk assessment system in FMEA analysis can refer to the limitations on the risk assessment method in FMEA analysis in the above text, and will not be elaborated here.
[0057] In an exemplary embodiment, as Figure 2 shown, a risk assessment system in FMEA analysis is provided, including:
[0058] A failure analysis module, configured to perform failure analysis on each function in the product structure tree of the target product to obtain the failure causes, failure modes, and failure consequences of each function; each lower-level node of each component in the product structure tree includes a function.
[0059] A measure application module, configured to add control measures to the failure causes, failure modes, and failure consequences. The control measures include preventive measures, detection measures, and response measures.
[0060] A first AP rating determination module, configured to determine the first AP rating of each function according to the usage frequency, controllability, and severity of the failure consequences of each function after applying the control measures to the functions after failure analysis.
[0061] The first AP rating determination module is further configured to input the usage frequency band, controllability, and severity of the failure consequences of the function through an operation interface.
[0062] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope described in this specification.
[0063] In this text, specific examples are used to elaborate on the principles and implementation manners of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. At the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation manners and application scopes. To sum up, the content of this specification should not be construed as a limitation on this application.
Claims
1. A risk assessment method in FMEA analysis, characterized in that, The risk assessment method in the FMEA analysis includes: Performing failure analysis on each function in the product structure tree of the target product to obtain the failure causes, failure modes, and failure consequences of each function; each lower-level node of each component in the product structure tree includes a function. Adding control measures to the failure causes, failure modes, and failure consequences, where the control measures include preventive measures, detection measures, and response measures. After applying the control measures to the functions after failure analysis, determining the first AP level of each function according to the usage frequency, controllability, and severity of the failure consequences of each function.
2. The risk assessment method in the FMEA analysis according to claim 1, wherein After determining the first AP level of each function according to the usage frequency, controllability, and severity of the failure consequences of each function, the risk assessment method in the FMEA analysis further includes: when the first AP level of a function is greater than the set level, adding optimization measures to this function.
3. The risk assessment method in the FMEA analysis according to claim 2, wherein The optimization measures include the preventive measures, the detection measures, and the response measures.
4. The risk assessment method in the FMEA analysis according to claim 2, wherein After adding optimization measures to a function when the first AP level of the function is greater than the set level, the risk assessment method in the FMEA analysis further includes: Updating the controllability of the function after adding the optimization measures. Determining the second AP level of the function after adding the optimization measures according to the usage frequency, the updated controllability, and the severity of the failure consequences of the function after adding the optimization measures.
5. The risk assessment method in the FMEA analysis according to claim 1, wherein Determining the first AP level of each function according to the usage frequency, controllability, and severity of the failure consequences of each function specifically includes: Based on the AP level definition, determining the first AP level of the function according to the corresponding relationship between the usage frequency, controllability, and severity corresponding to the function and the AP level; the AP level definition is used to determine the corresponding relationship between the usage frequency, controllability, and severity and the AP level.
6. The risk assessment method in the FMEA analysis according to claim 4, characterized in that, Determining the second AP level of the function after adding the optimization measures according to the usage frequency, the updated controllability, and the severity of the failure consequences of the function after adding the optimization measures specifically includes: Based on the AP level definition, determining the second AP level of the function after adding the optimization measures according to the corresponding relationship between the usage frequency, the updated controllability, and the severity corresponding to the function after adding the optimization measures and the AP level.
7. The risk assessment method in the FMEA analysis according to claim 1, characterized in that, After determining the second AP level of the function after adding the optimization measures according to the usage frequency, the updated controllability, and the severity of the failure consequences of the function after adding the optimization measures, the risk assessment method in the FMEA analysis further includes: visually displaying the first AP level or the second P level of each function after failure analysis.
8. The risk assessment method in the FMEA analysis according to claim 1, wherein After determining the first AP level of each function according to the usage frequency, controllability, and severity of the failure consequences of each function, the risk assessment method in the FMEA analysis further includes: outputting an FMEA analysis report.
9. A risk assessment system in FMEA analysis, characterized in that, The risk assessment system in the FMEA analysis includes: A failure analysis module for performing failure analysis on each function in the product structure tree of the target product to obtain the failure causes, failure modes, and failure consequences of each function; each lower-level node of each component in the product structure tree includes a function. An implementation measure module for adding control measures to the cause of failure, failure mode, and consequences of failure, where the control measures include preventive measures, detection measures, and response measures; A first AP level determination module for determining the first AP level of each function according to the usage frequency, controllability, and severity of the consequences of failure of each function after applying the control measures to the functions after failure analysis.
10. The risk assessment system in the FMEA analysis according to claim 9, wherein The first AP level determination module is further configured to input the usage frequency band, controllability, and severity of the consequences of failure of the function through an operation interface.