Complex system serviceability design evaluation method and apparatus

• US 20040193958A1
• Filed: 03/28/2003
• Published: 09/30/2004
• Est. Priority Date: 03/28/2003
• Status: Active Grant

• Current Assignee: GE Medical Systems Inc (GE Aerospace)
• Original Assignee: GE Medical Systems Inc (GE Aerospace)
• Inventors: Sambasivan, Sreevidya, Joshi, Amey Sudhakar, Graichen, Catherine Mary, Rajiv, Vrinda, Osborn, Mark David, Chen, Jieqian Cathy, Waldron, Ernest Joseph, Shah, Rasiklal Punjalal
• Granted Patent: US 7,249,284 B2
• Time in Patent Office: Days
• US Class Current: 714/37
• CPC Class Codes: G05B 23/0278 Qualitative, e.g. if-then rules; Fuzzy logic; Lookup tables; Symptomatic search; FMEA
• CPC Class Codes: G06F 11/0748 in a remote unit communicating with a single-box computer node experiencing an error/fault remote testing G06F11/2294
• CPC Class Codes: G06F 11/079 Root cause analysis, i.e. error or fault diagnosis in a hardware test environment G06F11/22; in a software test environment G06F11/36
• CPC Class Codes: H04L 41/0631 using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
• CPC Class Codes: H04L 41/0677 Localisation of faults
• CPC Class Codes: H04L 41/16 using machine learning or artificial intelligence

Abstract

A technique is provided for designing and evaluating service models for components, functions, subsystems and field replaceable units in a complex machine system. At a component or item level, each model identifies various items, failure modes, and so forth which may be the root cause of anticipated serviceable events or faults. The design tools permit numerous interfaces to be used in the design of service models, and in the evaluation of the degree to which the models address detectability and isolation capabilities for the root causes of serviceable events and faults.

Claims

1. A method for developing a service model for a complex system comprising:

displaying a service model definition interface;

identifying via the interface a plurality of failure modes for a complex system;

identifying via the interface a plurality of indicators representative of operational states of components of the complex system;

identifying via the interface a plurality of service actions for addressing the failure modes; and

displaying via the interface a representation of detectability of a plurality of failure modes associated via the indicators.

2. The method of claim 1, wherein the indicators include operational states detectable via sensors on the complex system.

3. The method of claim 1, wherein the indicators include operational states detectable via manual observation of the complex system.

4. The method of claim 1, wherein the indicators include operational states detectable via on-demand execution of a diagnostic test.

5. The method of claim 1, comprising identifying a plurality of components or functions of the complex system and a plurality of failure modes of the components or functions, the indicators providing isolation of serviceable events based upon the failure modes.

6. The method of claim 1, comprising identifying probabilities of occurrence of the failure modes.

7. The method of claim 1, comprising identifying costs of service actions for correction of the failure modes.

8. The method of claim 1, comprising creating a service model based upon the identified failure modes and indicators.

9. The method of claim 1, comprising displaying via the interface a representation of the ability to isolate individual failure modes of a plurality of failure modes associated via the indicators.

10. The method of claim 1, comprising identifying a component, function, subsystem or field replaceable unit of the complex system, wherein the indicators and failure modes are identified for the identified component, function, subsystem or field replaceable unit.

11. The method for claim 1, comprising displaying a plurality of different interfaces for identification of the indicators and failure modes, each interface being capable of displaying data input via a different interface for identification of the indicators and failure modes or for representing detectability of the plurality of failure modes associated via the indicators.

12. A method for developing a service model for a complex system comprising:

displaying a service model definition interface;

identifying via the interface a portion of interest of a complex system;

identifying via the interface a plurality of failure modes for the identified portion of interest of the complex system;

identifying via the interface a plurality of indicators representative of operational states of the complex system;

creating a service model based upon the identified portion of interest, the failure modes and the indicators; and

displaying via the interface a representation of a capacity of the model to detect and isolate the failure modes via the indicators.

13. The method of claim 12, wherein the portion of interest includes a single component, function, subsystem or field replaceable unit.

14. The method of claim 13, wherein the indicators and failure modes are identified for the identified component, function, subsystem or field replaceable unit.

15. The method of claim 12, wherein the indicators include remotely sensible and manually observable indicators.

16. The method of claim 12, comprising identifying probabilities of occurrence of the failure modes.

17. The method of claim 12, comprising identifying costs of service actions for correction of the failure modes.

18. A method for claim 12, comprising displaying a plurality of different interfaces for identification of the indicators and failure modes, each interface being capable of displaying data input via a different interface for identification of the indicators and failure modes or for representing the capacity of the model to detect and isolate the failure modes via the indicators.

19. A method for developing a service model for a complex system comprising:

identifying a component, function, subsystem or field replaceable unit of interest of a complex system;

identifying a plurality of failure modes for the identified component, function, subsystem or field replaceable unit of interest;

identifying a plurality of indicators representative of operational states of the complex system;

identifying via the interface a plurality of service actions for addressing the failure modes;

creating a service model based upon the identified component, function, subsystem or field replaceable unit, the failure modes, the indicators and the service actions; and

automatically evaluating a capacity of the model to detect and isolate the failure modes via the indicators.

20. The method of claim 19, comprising displaying a graphical user interface having fields for identifying the component, function, subsystem or field replaceable unit, the failure modes and the indicators.

21. The method of claim 20, comprising displaying a plurality of different interfaces for identification of the indicators and failure modes, each interface being capable of displaying data input via a different interface for identification of the indicators and failure modes or for representing the capacity of the model to detect and isolate the failure modes via the indicators.

22. The method of claim 19, wherein the indicators include remotely sensible, manually observable indicators and indicators provided by on-demand execution of a diagnostic test.

23. The method of claim 19, comprising identifying probabilities of occurrence of the failure modes.

24. The method of claim 19, comprising identifying costs of service actions for correction of the failure modes.

25. A system for developing a service model for a complex system comprising:

means for displaying a service model definition interface;

means for identifying via the interface a plurality of failure modes for a complex system;

means for identifying via the interface a plurality of indicators representative of operational states of components of the complex system;

means for identifying via the interface a plurality of service actions for addressing the failure modes; and

means for displaying via the interface a representation of detectability of a plurality of failure modes associated via the indicators.

26. A system for developing a service model for a complex system comprising:

means for displaying a service model definition interface;

means for identifying via the interface a portion of interest of a complex system;

means for identifying via the interface a plurality of failure modes for the identified portion of interest of the complex system;

means for identifying via the interface a plurality of indicators representative of operational states of the complex system;

means for creating a service model based upon the identified portion of interest, the failure modes and the indicators; and

means for displaying via the interface a representation of a capacity of the model to detect and isolate the failure modes via the indicators.

27. A system for developing a service model for a complex system comprising:

means for identifying a component, function, subsystem or field replaceable unit of interest of a complex system;

means for identifying a plurality of failure modes for the identified component, function, subsystem or field replaceable unit of interest;

means for identifying a plurality of indicators representative of operational states of the complex system;

means for identifying via the interface a plurality of service actions for addressing the failure modes;

means for creating a service model based upon the identified component, function, subsystem or field replaceable unit, the failure modes, the indicators and the service actions; and

means for automatically evaluating a capacity of the model to detect and isolate the failure modes via the indicators.

28. A computer program for developing a service model for a complex system comprising:

at least one machine readable medium for storing computer code; and

computer code stored on the media for performing a series of routines including displaying a service model definition interface, identifying via the interface a plurality of failure modes for a complex system, identifying via the interface a plurality of indicators representative of operational states of components of the complex system, identifying via the interface a plurality of service actions for addressing the failure modes,;

and displaying via the interface a representation of detectability of a plurality of failure modes associated via the indicators.

29. A computer program for developing a service model for a complex system comprising:

at least one machine readable medium for storing computer code; and

computer code stored on the media for performing a series of routines including displaying a service model definition interface, identifying via the interface a portion of interest of a complex system, identifying via the interface a plurality of failure modes for the identified portion of interest of the complex system, identifying via the interface a plurality of indicators representative of operational states of the complex system, creating a service model based upon the identified portion of interest, the failure modes and the indicators, and displaying via the interface a representation of a capacity of the model to detect and isolate the failure modes via the indicators.

30. A computer program for developing a service model for a complex system comprising:

at least one machine readable medium for storing computer code; and

computer code stored on the media for performing a series of routines including identifying a component, function, subsystem or field replaceable unit of interest of a complex system, identifying a plurality of failure modes for the identified component, function, subsystem or field replaceable unit of interest, identifying a plurality of indicators representative of operational states of the complex system, identifying via the interface a plurality of service actions for addressing the failure modes, creating a service model based upon the identified component, function, subsystem or field replaceable unit, the failure modes, the indicators and the service actions, and automatically evaluating a capacity of the model to detect and isolate the failure modes via the indicators.