Shift Coverage Gap Calculator

Worked example

A required coverage window of 09:00 to 17:00, covered by two staff blocks running 09:00 to 13:00 and 15:00 to 17:00, leaves a 2-hour gap between 13:00 and 15:00 that no one is actually scheduled to cover. Add a third block from 12:30 to 15:30 that overlaps both existing blocks, and the gap closes entirely, since the required window is now covered continuously even though two of the three blocks overlap each other for part of their length. That overlap is deliberately allowed here, unlike breaks or punches elsewhere in this category, because two people can legitimately be scheduled to cover the same stretch of time at once, such as during a shift handoff, without it being an error.

Common mistakes

• Assuming overlapping coverage blocks count twice toward the covered total. They do not. Overlapping coverage of the required window is counted once, since the window only needs to be covered, not covered multiple times over.
• Forgetting to check the reported overage figure, which captures coverage that falls outside the required window entirely, such as someone arriving well before the window opens.

Limitations

This checks whether a required window is covered by the stated blocks. It does not know actual staffing costs, whether a specific person is qualified for the required role, or any scheduling policy beyond the plain coverage math itself.