The person assigned to a trouble ticket may change as the trouble ticket moves through the resolution process. The Assigned To History tab on the View Trouble Ticket and Edit Trouble Ticket windows lists the people that have been assigned to a trouble ticket.
To view the Assigned To History for a trouble ticket:
Click the Journals tab in the Customer window.
Right-click on the trouble ticket, and select View (if trouble ticket is closed) or Edit (if trouble ticket is open).
From the View Trouble Ticket or Edit Trouble Ticket window, click the Assigned To History tab. This displays the list of people that have been assigned to this trouble ticket.

The Assigned To History tab contains the following information:
Assigned To
Name of person assigned to this trouble ticket.
Start Date
Date this person was assigned to this trouble ticket.
End Date
Date this person was removed from this trouble ticket.
If an End Date is not specified, this indicates that person is currently assigned to this trouble ticket.