| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a method and a device for determining objectively and quantitatively optimum maintenance time by cost assessment on a risk basis in extracting failure of equipment composing a plant and failure phenomena conceivably associated therewith or monitoring the minimum items online. <P>SOLUTION: The device is provided with a means 1 for inputting the inspection information and the operation history information, a failure link deployment means 2 for deploying conceivable failures from the inspection phenomena into a tree, a failure function calculation means 4 for calculating degrees of unreliability between respective items in the failure link deployment, a failure recovery estimated cumulative cost calculation means 6 which multiplies respective unreliability degrees by expenses necessary for recovery of the phenomena and adds up the results in accordance with the failure link deployment, a preventive maintenance total cost calculation means 7 for calculating the expense for preventive maintenance measures to prevent the failure phenomena, and a maintenance determination means 8 which compares and determines the entire cost for preventive maintenance and the failure recovery estimated cumulative cost, and determines the maintenance time and the method. <P>COPYRIGHT: (C)2004,JPO |
