Prioritized test procedure and step display using statistical feedback
First Claim
1. A method for updating a fault tree used in diagnosis of a condition of a machine, the fault tree comprising a sequence of test modules, each of the test modules being assigned a confidence score, the confidence score representing a probability that the associated test module will lead to a correct diagnosis of the machine condition, the method comprising the steps of:
- obtaining service data from a plurality of service occasions for like machines;
revising the confidence score for at least one test module in the fault tree based on the service data; and
revising the sequence of the test modules in the fault tree based on the revised confidence score(s).
4 Assignments
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Accused Products
Abstract
A method is provided for updating a fault tree used in diagnosis of a condition of a machine. The fault tree is a sequence of test modules. Each of the test modules is assigned a confidence score indicating the likelihood that the test module will lead to a diagnosis. The method comprising the steps of obtaining service data from a plurality of service occasions for like machines, revising the confidence score for at least one test module in the fault tree based on the service data; and revising the sequence of the test modules in the fault tree based on the revised confidence score(s). The sequence is revised such that the most likely modules to result in a diagnosis are listed first, and the least likely ones are listed last. The re-ordering is based on feedback from actual service instances in the field, and thus is more likely to reflect real-world conditions. The result is that service technicians using the revised fault trees work more efficiently, at least on a statistical basis.
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Citations
34 Claims
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1. A method for updating a fault tree used in diagnosis of a condition of a machine, the fault tree comprising a sequence of test modules, each of the test modules being assigned a confidence score, the confidence score representing a probability that the associated test module will lead to a correct diagnosis of the machine condition, the method comprising the steps of:
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obtaining service data from a plurality of service occasions for like machines; revising the confidence score for at least one test module in the fault tree based on the service data; and revising the sequence of the test modules in the fault tree based on the revised confidence score(s). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for updating a fault tree used in diagnosis of a condition of a machine, the fault tree comprising a sequence of test modules, each of the test modules being assigned a confidence score, the method comprising the steps of:
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obtaining service data from a plurality of service occasions for like machines; revising the confidence score for at least one test module in the fault tree based on the service data; and revising the sequence of the test modules in the fault tree based on the revised confidence score(s);
wherein at least one test module in the fault tree is assigned a technician level score in addition to the confidence score. - View Dependent Claims (10)
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11. A method for updating a fault tree used in diagnosis of a condition of a machine, the fault tree comprising a sequence of test modules, each of the test modules being assigned a confidence score, the method comprising the steps of:
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obtaining service data from a plurality of service occasions for like machines; revising the confidence score for at least one test module in the fault tree based on the service data; and revising the sequence of the test modules in the fault tree based on the revised confidence score(s);
wherein at least one test module in the fault tree is assigned an access number in addition to the confidence score, the access number indicating the number of times a technician accessed the test module. - View Dependent Claims (12)
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13. A system for generating a revised fault tree for a machine using statistical feedback, comprising:
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a computer system having a memory storing a fault tree; a database containing service data from a plurality of prior service occasions for like machines, the service occasions associated with the fault tree; a terminal for providing human access to the fault tree and the database; wherein the fault tree comprises a plurality of test modules each assigned a confidence score and wherein the confidence score is revised for at least one test module in the fault tree based on the service data and wherein the sequence of the test modules in the fault tree is revised based on the revised confidence score(s). - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A system for generating a revised fault tree for use by a technician in diagnosing a condition of a machine using statistical feedback, comprising:
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a computer system having a memory storing a fault tree; a database containing service data from a plurality of prior service occasions for like machines; a set of machine instructions executed by the computer system wherein the instructions access the service data and revise a confidence score for at least one test module in the fault tree based on the service data; the instructions further comprising instructions revising the sequence of the test modules in the fault tree based on the revised confidence score(s). - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification