I have a use case where I have to check that the assigned task days to a project fit within the days available between the project start and end dates, after accounting for weekends. I initially had a solution that excluded Saturdays and Sundays, but I wanted something more flexible so I have a solution that allows for different working days per project. This obviously could be adapted to account for working pattertns for employees too if required. I have attached the steps in the document. Hope it helps David