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Time to Replace

Description
 
The Time to Replace calculation represents the time associated with replacing all items (using Block Replacement) in a given isolated fault group. (Note: eXpress converts all object replacement times to minutes.)
 
Calculation
 
For a given isolated fault group, the Time to Replace is calculated by summing the replacement times associated with each item in the isolated group:
where
FGx
=
the xth isolated fault group
Nx
=
the number of replaceable items within FGx
ItemTimei
=
the time attribute Test limit for the ith item within FGx