Reverse Failure Analysis Method and Apparatus for Diagnostic Testing

• US 20100293078A1
• Filed: 07/26/2010
• Published: 11/18/2010
• Est. Priority Date: 06/14/2006
• Status: Active Grant

• Current Assignee: SPX Corporation
• Original Assignee: SPX Corporation
• Inventors: Underdal, Olav M., Portyanko, Oleksiy, Wittliff, William W. III, Mayes, Randy L., Gilbert, Harry M., Fountain, Gregory J.
• Granted Patent: US 8,116,933 B2
• Time in Patent Office: Days
• US Class Current: 705/28
• CPC Class Codes: G06N 5/02 Knowledge representation; Symbolic representation
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders

Abstract

A reverse failure analyzer determines a group of diagnostic test procedures related to a particular vehicle component from a pool of diagnostic procedures, and then identifies the specific failure modes of each of the diagnostic test procedures. The reverse failure analyzer further associates the specific failure modes with the respective vehicle component associated with each of the diagnostic test procedures, and the symptoms associated with each of the diagnostic test procedures to the correlated vehicle components and failure modes. In addition, the reverse failure analyzer can cross-reference various vehicle components that can be the root cause of a particular symptom or a vehicle operational problem. Furthermore, the reverse failure analyzer can receive observed symptoms regarding a particular test subject vehicle and correlate the observed symptoms to the vehicle components that can cause the symptoms based on the results of reverse failure analyses.

Claims

1. A diagnostic tool for performing a reverse failure analysis, comprising:

a diagnostic test selector module configured to select a first diagnostic test related to a component of a vehicle from a pool of diagnostic tests;

a symptom to component associator module configured to associate a first symptom with the component based on the first diagnostic test;

an observed symptoms receiving module configured to receive a plurality of observed symptoms of a test subject vehicle; and

a symptom to component correlator module configured to correlate the observed symptoms to the component based on the observed symptoms corresponding to at least the first symptom, wherein the diagnostic test selector module is further configured to select a second diagnostic test related to the component from the pool of diagnostic tests and the symptom to component associator module is further configured to associate a second symptom with the component based on the second diagnostic test.

2. The tool of claim 1 further comprising:

a failure mode identifier module configured to identify a specific failure mode associated with each diagnostic test in the pool; and

a failure mode to component associator module configured to associate each of the failure modes to each component of the vehicle.

3. The tool of claim 2 further comprising:

a symptom to failure mode associator module configured to associate each of the symptoms that can be caused by a specific failure mode identified with the failure mode identifier module with the specific failure mode.

4. The tool of claim 1, wherein the symptom to component associator module is further configured to associate each of the symptoms related to each of the diagnostic tests in the pool with the respective component associated with the diagnostic tests;

5. The tool of claim 1 further comprising:

a component cross referencer is configured identify the vehicle components that can be the root cause of the observed symptoms and cross reference those vehicle components with each other.

6. The tool of claim 1, wherein the diagnostic test selector module is configured to determine a group of diagnostic tests that are related to the component.

7. The tool of claim 1, wherein the symptom to component correlator uses the results of the diagnostic tests to correlate the observed symptom to the test vehicle'"'"'s component that can be a root cause of the observed symptom.

8. The tool of claim 1, wherein the symptom to component correlator is used to plan inventory in a service center.

9. The tool of claim 1, wherein the symptom to component correlator is used to plan inventory in a mobile service unit.

10. A computer implement method of reverse failure analysis, comprising the steps of:

selecting a first and a second component to test using the reverse failure analysis;

selecting diagnostic tests from a group of diagnostic tests related to the first and second component;

associating symptoms that are generated by the diagnostic tests appropriately with the first and second component; and

cross referencing the first and second component with each other if they have related symptoms.

11. The method of claim 10 further comprising the steps of:

identifying specific failure modes related to each of the selected diagnostic tests; and

associating failure modes with the first and second component.

12. The method of claim 11 further comprising the step of:

associating symptoms with failure modes.

13. The method of claim 11 further comprising the steps of:

receiving observed symptoms from a vehicle under test;

identifying correlated symptoms by correlating the observed symptoms with the symptoms generated by the diagnostic tests of the first and second components; and

correlating the observed symptoms with the first or second component that can be the root cause of the correlated symptoms.

14. The method of claim 11 further comprising the step of:

correlating received observed symptoms with the failure modes.

15. The method of claim 12, wherein the association of symptoms with failure modes further includes all known or possible symptoms that are caused by a particular failure mode can be associated with that particular failure mode.

16. The method of claim 10, wherein the associating symptoms with the first component and the second component step is used to plan inventory in a service center.

17. The method of claim 10, wherein the associating symptoms with the first component and the second component step is used to plan inventory in a mobile service unit.

18. A diagnostic tool for performing a reverse failure analysis, comprising:

a diagnostic test selector module configured to select a first diagnostic test related to a first component of a vehicle from a pool of diagnostic tests;

a symptom to component associator module configured to associate a first symptom with the first component based on the first diagnostic test; and

a component cross referencer module configured to cross reference the first component with a plurality of components based on the first component and the plurality of components being associated with the first symptom.

19. The diagnostic tool of claim 18, wherein the diagnostic test selector module is further configured to select diagnostic tests for each of the plurality of components, the symptom to component associator module is further configured to associate the symptoms generated by the diagnostic tests with the respective plurality of components, and the component cross referencer module is further configured to cross reference the plurality of components with each other based on associated symptoms.

20. The diagnostic tool of claim 18 further comprising a symptom to component asscociator module configured to use the results of the diagnostic tests to correlate the observed symptom to the test vehicle'"'"'s component that can be a root cause of the observed symptom.