Capacity Planning - Availability Calculating Incorrectly

Hi All,

I've activity capacity "adding up" for a workcentre. If a workcentre has a capcity or 120 hours and activities for 5 operations showing 12 hours each, it is showing the capacity of the workcentre to be 50% rather than 10%. I believe it is also scheduling each activity on a workcentre to complete before the next activity can start. Can somebody please confirm this?

Thanks,

Brad?