Ignoring all filters in set analysis

[orangebloss]

I need a static KPI that doesn't change when any filters are used throughout my app,

reading around it looks like the key is using {1} but I'm evidently not getting it in the right place as it's not working!

Current format is as below which returns a null when a filter is selected:

1-

((Sum({1}{$<TdateYear={"(=$(vCurrentYear))"},NPD_Other={'Overhead'}>} Nmhrs))+ (Sum({1}{$<TdateYear={"(=$(vCurrentYear))"},NPD_Other={'Overhead'}>} OThrs)))/

((Sum({1}{$<TdateYear={"(=$(vCurrentYear))"}>} Nmhrs))+ (Sum({1}{$<TdateYear={"(=$(vCurrentYear))"}>} OThrs)))

[orangebloss]

Thanks Marcus - why would the rangesum give me a different result to my original total ? 

[marcus_sommer]

By combining values with the normal math operators each non-numeric result for one of them will produce NULL for the entire calculation-level. The range-functions instead handle each non-numeric parameter as ZERO. Within the most scenarios is this type of error/exception-handling more suitable and expedient as getting NULL.