Lookup OR Index/Match with multiple Array's

Dear All,

I'm facing another problem within my worksheet, Below I made a similiar example of what I try to acquire...
I need to lookup for EACH year the results if a system (dropdown list in cell B28) is OK or NOT OK, but it also needs to look at what site (Dropdown list in cell C28 )

I tried initially with VLOOKUP($B$28;$B$4:$Q$4;2)...VLOOKUP($B$28;$B$4:$Q$4;3)...VLOOKUP($B$28;$B$4:$Q$4;4)...
and this works, but only for one array and one look up value at a time.

Is there a way where I can use INDEX/MATCH or CHOOSE to work with the 2 values to look up at?

Thanks in Advance
Numnum