How Available capacity calculated in CM01

Hi All,

I can see below table details in CM01

Week          Requirements          Available capacity            CapLoad       RemAvailalbe cap     Unit

24/2014             320.72                    120.00                             267%             220.22-                  H

25/2014             77.86                       168.00                            46%                 90.14                   H

26/2014             25.17                       168.00                             15%                142.83                  H

In week, 24/2014, available capacity 120, I want to know How it is being calculated?

In Week  25/2014 available capacity is 168, I want to know how it is being calculated?

In WorkCentre, capacity calculated as 1440 min ( Operating time 24 hours and capacity utilization is 100% so, capacity is 24*60= 1440 min)

I want to know How availbable capacity is calculated in CM01 based on workcentre capacity?

Regards,

Uday