# Double Assignments - Block, Warn, Allow
When an employee is scheduled to work two different shifts at exactly the same time this is called a **Double Assignment**. Depending on how your business uses WorkRoster, having double assignments on the rosters might be okay, or it might be a problem.
The _Workforce Settings_,
- Resource Double Assignments
- Client Double Assignments
- Employee Double Assignments
control how WorkRoster allows and displays double assignments on the roster.
When these settings are set to **warn** then double assignments are shown on the roster with a strike written through the assignee's name, like this.
Hover the mouse pointer over the assignment to see a tool-tip with further information about the double-assignment.
_a Double Assignment_
Potential double assignments are also highlighted on the _Assignment Menu._ The strike through name is displayed only as a visual warning to the roster manager and WorkRoster will not stop you from making a double assignment when the _Workforce Setting_ is set to **warn**.
Conflicting _Holidays_ on the roster are also shown with a strikethrough. This is just a visual warning to the roster manager.
_Double Assignment with Holiday_
Please note that _double assignments_ will be fully counted twice in hourly totals shown on the WorkRoster website and in the WorkRoster reports.
When a _Workforce Setting_ for double assignments is set to **block** then it's not possible to create double assignments. For instance, where an employee is already assigned elsewhere, their name will not appear in the _Assignment Menu_.
When a Workforce setting for double assignments is set to **okay** then double assignments are allowed and there is no strike through highlighting.
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