What is the minimum cost of the SIF in a low demand mode with SIL 3 and MTTF requirement of
at least 50 years?
The test interval is every 4 years.
Route 2H method is used for determining the Hardware Fault Tolerance of the subsystems.
Please use the SIF element data given below.
Please also copy and paste the Excel table you might have used to find out
SIF Element Data
Element
$\lambda_{DU}$
$\lambda_{S}$
MTTR Unit Cost
Year
failures/year failures/year
US$
Transmitter
LT1003
0.003
0.008
1 $3,000
Logic Solver
SIS-02
0.0002
0.0006
1 $15,000
On/Off valve
XV1003
0.004
0.007
1 $4,000