Hi,
For your information as this is not really fully helping your case, I did check a little extra with some people from Xtraction on this with no real better result that my previous statement.
There is a way to remove weekend from the calculation as shown below but need to be hardcoded in your report and don't include the non business hours of week day
CASE WHEN INCIDENT.RESOLVE_DATE IS NULL THEN NULL ELSE ((INCIDENT.RESOLVE_DATE - INCIDENT.OPEN_DATE)/86400) - 2*(TO_CHAR((TO_DATE( '1/1/1970','DD/MM/YYYY')+ (INCIDENT.OPEN_DATE/86400)),’WW’) - TO_CHAR((TO_DATE( '1/1/1970','DD/MM/YYYY')+ (INCIDENT.RESOLVE_DATE/86400)),’WW’)) END
/J