05132920 is referenced by 52 patents and cites 17 patents.

The system of the present invention uses the importance of a piece of malfunctioning equipment, the severity and the confidence level in a diagnosis to determine repair priority of the equipment by obtaining the product (46) of the confidence level (CF), importance (IMP) and severity (SEV). The these variables are determined by expert system rules. The severity is the reciprocal (88) of the time to failure. The importance (44) is the cost to repair the maximum damage when the malfunction continues. A malfunction can affect several pieces of equipment in combination, the severity and importance associated with each piece is combined (70) with the confidence and used to determine the repair priority. When the diagnosis of a malfunction is by malfunctioning sensors, the expected equipment life (40) and the availability (86) of sensors that provide a partial backup are considered in prioritizing sensor as well as equipment repair. When a primary piece of equipment is backed up (100), the effect of both pieces of equipment failing (106) is considered in prioritizing the repair. The system ranks the repair of all possible malfunctions on a common scale. The system gives a complete repair priority picture and allows the cost effectiveness to be maximized.

Title
Automated system to prioritize repair of plant equipment
Application Number
7/156064
Publication Number
5132920
Application Date
February 16, 1988
Publication Date
July 21, 1992
Inventor
Christian T Kemper
Silver Spring
MD, US
Avelino J Gonzalez
Winter Springs
FL, US
Robert L Osborne
Winter Springs
FL, US
James C Bellows
Maitland
FL, US
Assignee
Westinghouse Electric
PA, US
IPC
G06G 7/54
G06F 15/20
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