Statistical analysis and control of preventive maintenance procedures
First Claim
1. A method comprising:
- analyzing maintenance data to identify preventive maintenance procedures and unplanned maintenance procedures performed on equipment;
mapping the unplanned maintenance procedures to identifiers associated with the preventive maintenance procedures;
determining whether statistical correlations exist between the preventive maintenance procedures and the unplanned maintenance procedures based on the mapping; and
updating a schedule for performing the preventive maintenance procedures based on the determination.
1 Assignment
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Accused Products
Abstract
Techniques are described for determining the effectiveness of preventive maintenance procedures in detecting and reducing equipment failures. The techniques make use of historical maintenance data, e.g., maintenance data from a computerized maintenance management system (CMMS), that identifies the preventive maintenance procedures, as well as unplanned maintenance procedures for repairing the equipment. The techniques are used to statistically analyze the maintenance data to determine whether a statistical correlation exists between the preventive and unplanned maintenance procedures. In particular, the techniques correlate any failures experienced by that equipment, as serviced by the unplanned maintenance procedures, to the preventive maintenance procedures that were designed to detect or eliminate those failures. Based on the analysis, an effectiveness of each preventive maintenance activity can be determined, and a respective frequency of each preventive maintenance activity can be statistically controlled.
42 Citations
51 Claims
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1. A method comprising:
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analyzing maintenance data to identify preventive maintenance procedures and unplanned maintenance procedures performed on equipment;
mapping the unplanned maintenance procedures to identifiers associated with the preventive maintenance procedures;
determining whether statistical correlations exist between the preventive maintenance procedures and the unplanned maintenance procedures based on the mapping; and
updating a schedule for performing the preventive maintenance procedures based on the determination. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
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generating one or more correlation equations from maintenance data that specifies preventive maintenance procedures and unplanned maintenance procedures performed on equipment; and
outputting a schedule for performing the preventive maintenance procedures based on the correlation equations. - View Dependent Claims (20, 21, 22, 23)
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24. A method comprising:
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presenting an interface to receive maintenance data that define shop work orders for preventive maintenance procedures and unplanned maintenance procedures for equipment, wherein the interface includes an input area to map the shop work orders to identifiers associated with the preventive maintenance procedures;
automatically analyzing the maintenance data in accordance with the mapping to determine whether statistical correlations exist between the preventive maintenance procedures and the unplanned maintenance procedures; and
automatically updating frequencies associated with the preventive maintenance procedures based on the determination. - View Dependent Claims (25, 26)
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27. A computer-readable medium comprising instructions for causing a processor to:
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present an interface to receive maintenance data that define shop work orders for preventive maintenance procedures and unplanned maintenance procedures for equipment, wherein the interface includes an input area to map the shop work orders to identifiers associated with the preventive maintenance procedures;
automatically analyze the maintenance data in accordance with the mapping to determine whether statistical correlations exist between the preventive maintenance procedures and the unplanned maintenance procedures; and
automatically update frequencies associated with the preventive maintenance procedures based on the determination. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A system comprising:
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a database that stores maintenance data that describes preventive maintenance procedures and unplanned maintenance procedures performed on equipment;
a scheduler that generates a schedule for the preventive maintenance procedures in accordance with respective frequencies; and
a statistical analysis module that analyzes the maintenance data and computes updated frequencies for the preventive maintenance procedures. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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Specification