Question $5$:

A maintenance system is formed by a combination of $6$ elements as shown. You are required to calculate the system's Reliability and Availability if following information are known:

Tup $=$ Time up for production

$\backslash$table$[[$Element$,$Reliability,Tup,Tdm$],[1,0\mathrm{.}95,8760,240],[2,0\mathrm{.}95,8760,300],[3,0\mathrm{.}97,8760,360],[4,0\mathrm{.}95,8760,280]]$

$2$

$\backslash$table$[[5,0\mathrm{.}95,8760,420],[6,0\mathrm{.}97,8760,450]]$

A$.$ Reliability $=98\mathrm{.}22\%,$ Availability $=98\mathrm{.}19\%$

B$.$ Reliability $=97\mathrm{.}18\%,$ Availability $=97\mathrm{.}12\%$

C$.$ Reliability $=99\mathrm{.}74\%,$ Availability $=99\mathrm{.}89\%$

D$.$ Reliability $=92\mathrm{.}51\%,$ Availability $=92\mathrm{.}25\%$