System and method for early detection of system component failure
First Claim
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1. A method for detecting trends in time-managed lifetime data, comprising the steps of:
- storing in a database time-managed lifetime data for a product;
establishing a criterion from said data for measuring failure of said product;
comparing measured failures of the product within a time window against expected failures of the product within said time window; and
triggering an alarm signal when a value of said comparison exceeds a threshold, said threshold being chosen to limit false alarms to a pre-specified rate,wherein said product is comprised of components and is shipped in a sequence of discrete vintages within said time window, said time-managed lifetime data for each said vintage being updated periodically with new information as each said vintage progresses through said time window.
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Abstract
A system and method for detecting trends in time-managed lifetime data for products shipped in distinct vintages within a time window. Data is consolidated from several sources and represented in a form amenable to detection of trends using a criterion for measuring failure. A weight is applied to the failure measures, the weight increasing over the time the products are in the time window. A function of weighted failures is used to define a severity index for proximity to an unacceptable level of failures, and an alarm signal is triggered at a threshold level that allows the level of false alarms to be pre-set.
48 Citations
12 Claims
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1. A method for detecting trends in time-managed lifetime data, comprising the steps of:
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storing in a database time-managed lifetime data for a product; establishing a criterion from said data for measuring failure of said product; comparing measured failures of the product within a time window against expected failures of the product within said time window; and triggering an alarm signal when a value of said comparison exceeds a threshold, said threshold being chosen to limit false alarms to a pre-specified rate, wherein said product is comprised of components and is shipped in a sequence of discrete vintages within said time window, said time-managed lifetime data for each said vintage being updated periodically with new information as each said vintage progresses through said time window. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for detecting trends in time-managed lifetime data, comprising the steps of:
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storing in a database time-managed lifetime data for a product; establishing a criterion from said data for measuring failure of said product; comparing measured failures of the product within a time window against expected failures of the product within said time window; triggering an alarm signal when a value of said comparison exceeds a threshold, said threshold being chosen to limit false alarms to a pre-specified rate, and determining whether the product is active; if the product is active, triggering a tertiary alarm signal when said comparison is a computation or simulation analysis determining a probability that a hypothetical sequence of vintages having said expected failures will produce within an active period a cumulative total of said expected failures greater than or equal to the cumulative total of said observed failures.
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Specification