無故障率 (No Fault Found Rate)





【TFD Vmetric Reference Guide (50) 次ページは英語原文】

NFF (No Fault Found Rate) (無故障率)

NFF is an optional input variable (Parts, or End Item/Part Data) representing the proportion of demands for a spare part which arise for some reason other than a failure. NFF is usually generated by ambiguity groups in fault isolation techniques or by error in repair. It is used to adjust the demands generated by a part of a given MTBF.

The value is used to modify the value of MRR6 obtained from the following calculation:

Duty cycle is an optional input.  If NFF is left blank, the value is be set to 0. Its value will have no effect if the data set contains a value in the MRR6 field.

« Back to Glossary Index