Inventory policies and tasks let you configure the inventory configuration options that you want to run on target computers. When you want to gather inventory only once or immediately, you use inventory tasks. When you want to gather inventory on a recurring schedule, you use inventory policies.
When you schedule an inventory policy, it runs on the schedule irrespective of whether any maintenance window is open. When you schedule an inventory task on a set of computers and do not select the Override Maintenance Window option, and the same set of computers has a maintenance window enabled, the task waits for the maintenance window to open.
When you use policies, any new computer that is a member of the target group automatically has the policy run on it.
You can use inventory policies and tasks in the following ways:
Enable predefined policies or clone and configure existing policies.
A few predefined policies are provided to help simplify inventory gathering. You can use predefined policies as they are or modify them to fit your needs. If you want to modify a predefined policy, Symantec recommends that you clone the original policy and then modify the copy.