Hi Ruediger

You don't mention if you want the additional formula to include the same
'System Details' references.

Do these references have predetermined values that add up a score, if so
then use the following:

=IF($B3=("Y"),'System Details'!$E$7)+IF($C3=("Y"),'System
Details'!$E$14)+IF($D3=("Y"),'System
Details'!$E$21)+IF($E3=("Y"),'System
Details'!$E$28)+IF($F3=("Y"),'System
Details'!$E$35)+IF($G3=("Y"),'System Details'!$E$44)+IF($H3=("Y"),
'System Details'!$E$51)+IF($I3=("Y"),'System
Details'!$E$58)+IF($J3=("Y"),'System
Details'!$E$65)+IF($K3=("Y"),'System
Details'!$E$72)+IF($L3=("Y"),'System
Details'!$E$79)+IF($M3=("Y"),'System
Details'!$E$88)+IF($N3=("Y"),'System
Details'!$E$95)+IF($O3=("Y"),'System
Details'!$E$100)+IF($P3=("Y"),'System
Details'!$E$109)+IF($Q3=("Y"),'System
Details'!$E$118)+IF($R3=("Y"),'System Details'!$E$126)

NOTE: the change from Semi-Colon (;) to Comma (,) also the ($) -
absolute reference to each of your original System Details Cells and the
absolute reference for the columns in your main sheet.

You can copy/Paste this down as far as you like.

HTH
Mick.