Create the activities data set and identify separate calendars. WELL.ACT is a permanent SAS data set that contains activities for a well construction project. The _CAL_ variable identifies the calendar that an activity belongs to.

data well.act;
   input task & $16. dur : 5. date : datetime16.  _cal_ $ cost;
   datalines;
Drill Well          3.50  01JUL96:12:00:00  CAL1   1000
Lay Power Line      3.00  04JUL96:12:00:00  CAL1   2000
Assemble Tank       4.00  05JUL96:08:00:00  CAL1   1000
Build Pump House    3.00  08JUL96:12:00:00  CAL1   2000
Pour Foundation     4.00  11JUL96:08:00:00  CAL1   1500
Install Pump        4.00  15JUL96:14:00:00  CAL1    500
Install Pipe        2.00  19JUL96:08:00:00  CAL1   1000
Erect Tower         6.00  20JUL96:08:00:00  CAL1   2500
Deliver Material    2.00  01JUL96:12:00:00  CAL2    500
Excavate            4.75  03JUL96:08:00:00  CAL2   3500
;