Duration

The Duration field will contain a numeric value which represents the number of business days between the begin and end dates on a task.  Should a task begin and end on a weekend, the duration would be 0.  The system will automatically generate this number if the begin and end date are supplied.

Updating this value will result in the recalculation of a tasks end date.

Should a task have a date range of BOT to EOT, the duration will reflect a value of 52179, which is the number of business days between 1/1/1900 and 12/31/2099.