Pick first groups allow process execution to wait for one or more events. The first event that completes determines which TRANSITION to take to continue processing. For EXAMPLE, as part of an order-entry system, when an order is placed, a check is made to SEE if the order can be filled from stocked INVENTORY or from RETURNED merchandise. Whichever system returns the information first is used to fill the order. If neither system returns the information about available inventory, the order time out and cancels.

Pick first groups allow process execution to wait for one or more events. The first event that completes determines which transition to take to continue processing. For example, as part of an order-entry system, when an order is placed, a check is made to see if the order can be filled from stocked inventory or from returned merchandise. Whichever system returns the information first is used to fill the order. If neither system returns the information about available inventory, the order time out and cancels.