Work Items are "To-Do" lists a user can use to create notes and reminders that may or may not be related to a Job. They can be assigned by a Manager to a user or they can be assigned by a user to himself. Work Items can be closed by either a Manager or user, but only a Manager can re-open a Work Item.
To assign a Work Item to yourself, select "Add My Work Item" from the "Actions" menu. To delegate a Work Item (Managers only), choose "Delegate Work Item" from the "Utilities" menu.
*Note: if you're on a network (Enterprise version), selecting "Refresh Work Items" will retrieve any new Work Items added by a Manager on the network while you were working.
Jobs are any Service Requests, Purchase Orders, Estimates, Estimate Follow-ups and Come-backs in which the user has some level of involvement (Service Writer, Parts Clerk, Mechanic, Manager). Current Jobs are persisted on the dashboard until closed. If a service is re-opened, Jobs are reassigned to the dashboard.
* Note: if you're on a network (Enterprise version), selecting "Refresh Jobs" will retrieve any new Jobs added by someone else on the network and assigned to you while you were working.