Factory calendar setting for workflow

Hi,

I have a scenario for deadline monitoring on my workflows which is set to 2 days. Works fine, except that it takes into account weekends. The factory calendar that we following is 73 - 7 day week + overtime, but the workflows are not supposed to take weekends into account because the management follow calendar 78 - 5 day working week.

I dont see any setting in workflow wherein I can choose the type of factory calendar needed for deadline escalation.

Is there a way to acheive this ?

Thanks,

Satish