SLA calculation w/DateTime::Set

[Kaare Rasmussen]

Hi 

I wonder if it is possible to use DT::Set for SLA calculations, and how much 
work it would take to get this done. 

SLA (Service Level Agreements) usually builds on some business hours where 
you are responsible for the downtime of the system. Business hours could 
look like this: 

Mon-Thurs: 7:30-18:00
Fri: 7:30-16:00 and 18:00-22:00 

Every first friday of the month: Service window from 12:00-16:00 

Holidays are to be excluded. 

If this could be declared infinite it would be nice, but not necessary. 

I would like to know how much time it took for an event to occur totally, 
and in business hours.