The components can be purchased from three different vendors, who have supplied the following reliability data:

$\backslash$table$[[,$Vendor$],[$Component$,1,2,3],[$A$,0\mathrm{.}81,0\mathrm{.}85,0\mathrm{.}89],[$B$,0\mathrm{.}82,0\mathrm{.}86,0\mathrm{.}90],[$C$,0\mathrm{.}83,0\mathrm{.}87,0\mathrm{.}91],[$D$,0\mathrm{.}84,0\mathrm{.}88,0\mathrm{.}92]]$