This article explains how to initiate a Mandatory Fill from the Call Shifts sub-module in First Due. Mandatory Fills allow administrators to force-hire personnel to fill critical staffing needs, distinguishing them from standard Call Shifts which are voluntary work requests. When initiated from the Call Shifts module, Mandatory Fills place personnel on the schedule without assigning them to specific apparatus or positions, providing flexibility for administrators to deploy resources where needed most.
Mandatory Fills are a critical staffing tool used by fire and EMS agencies to maintain minimum staffing requirements during periods of unexpected absences, high call volume, or other operational needs. Unlike voluntary Call Shifts where personnel can choose whether to work additional hours, Mandatory Fills enforce mandatory overtime policies as outlined in collective bargaining agreements and department policies.
The Mandatory Fill process typically follows a predetermined order based on factors such as seniority, certification levels, recent mandatory assignments, and FLSA compliance considerations. First Due's Call Shifts module automates the ranking and selection process, ensuring fair distribution of mandatory overtime while maintaining compliance with labor agreements.
Common scenarios requiring Mandatory Fills include:
Mandatory Fills initiated through the Call Shifts module provide visibility into the mandatory rotation order and allow administrators to document force-hire decisions for labor relations and payroll purposes.
Users must have the following permissions to initiate Mandatory Fills from the Call Shifts module:
1. Access the Call Shifts Module
Navigate to Scheduling > Call Shifts from the main menu. This opens the Call Shifts management interface.

2. Select Mandatory Fill Option
Click on the Mandatory tab within the Call Shifts interface to access Mandatory Fill functionality.

3. Initiate New Mandatory Fill
Click the New Mandatory Fill button to begin creating a mandatory staffing assignment.

4. Configure Time Parameters
Set the operational timeframe for the Mandatory Fill:
Ensure these times align with your agency's shift schedule and minimum staffing requirements.
5. Set Personnel Qualifications
Choose the required qualifier(s) for the position being filled. This ensures only appropriately certified personnel appear in the selection list. Qualifications may include:
6. Apply Advanced Filtering Options (Optional)
Click Advanced Options to refine the personnel selection pool using additional criteria:
7. Generate Eligible Personnel List
Click Generate List to create the ranked list of eligible personnel based on your selected criteria. The system will calculate and display personnel in mandatory rotation order according to your agency's configured rules.
8. Review Selection Parameters
The selected filtering criteria and qualifications appear at the top of the generated list for verification. Below this, you'll see the ranked list of eligible personnel with their relevant information (rank, qualifications, last mandatory date, etc.).

9. Move Personnel Without Forcing (Optional)
If you need to adjust the list or indicate personnel who volunteered for the assignment:
This is useful when someone volunteers to take a mandatory spot, preventing them from being marked as forced in the system.

10. Execute Mandatory Assignment
To force-hire an individual for the assignment:


Planning and Communication
System Configuration
Fair Distribution
Avoiding Common Mistakes
FLSA Compliance Considerations
Issue: No personnel appear in the generated list after clicking Generate List
Solution: This typically occurs when filtering criteria are too restrictive. Try the following:
Issue: Unable to move or force a specific individual in the list
Solution: This may indicate a conflict or restriction:
Q: What's the difference between a Call Shift and a Mandatory Fill?
A: A Call Shift is a voluntary request for personnel to work additional hours—personnel can choose whether to accept. A Mandatory Fill enforces mandatory overtime policies, requiring selected personnel to work regardless of preference. Call Shifts should always be attempted before resorting to Mandatory Fills.
Q: Does initiating a Mandatory Fill automatically place the person on the Shift Board?
A: No. Mandatory Fills from the Call Shifts module place personnel on the schedule but don't assign them to specific apparatus or positions. After forcing someone, you'll need to manually assign them to the appropriate position on the Shift Board based on operational needs.
Q: Can I force multiple people for the same time period?
A: Yes. You can force as many personnel as needed to meet staffing requirements. Each forced individual will be marked separately and notified of their mandatory assignment. Be sure to document the operational justification for multiple mandatory assignments.
Q: What if someone refuses a Mandatory Fill assignment?
A: Refusal to report for a mandatory assignment is typically addressed through your agency's disciplinary procedures, not through First Due. The system will document the forced assignment and notification. Any disciplinary action for refusal to report should follow your department's policies and applicable labor agreements.
Q: How far in advance should I initiate a Mandatory Fill?
A: This depends on your collective bargaining agreement and department policies. Many agencies require minimum notification periods (such as 4, 8, or 24 hours). Initiate Mandatory Fills as early as operationally possible to maximize notification time and minimize impact on personnel.
Q: Can I cancel a Mandatory Fill after it's been initiated?
A: Yes, you can cancel or modify Mandatory Fills before they take effect. Access the Call Shift record and update the status or delete the assignment. Be sure to notify the affected individual immediately if canceling a forced assignment to prevent unnecessary reporting.