P1: 1800-0600
4x 12hr shifts one week (1 off, 2 on, 2 off, 2 on) = 7 days
3x 12hr shifts second week ( 1 on, 2 off, 2 on, 2 off) = 7 days
Weeks 1 and 2 repeat for week 3 and 4
P2: 1800-0600
3x 12hr shifts one week (1 off, 2 on, 2 off, 2 on) = 7 days
4x 12hr shifts second week ( 1 on, 2 off, 2 on, 2 off) = 7 days
Weeks 1 and 2 repeat for week 3 and 4