Crew and schedule
New-hire and shift risk
A sense that incidents cluster around new staff or particular shifts, and no way to say whether that is true or just visible.
What the record usually shows
- Incident counts by employee, and sometimes by shift.
- Tenure recorded as a band, when it is recorded at all.
- A pattern that looks compelling until somebody asks about exposure.
What it hides
- How many hours each group actually worked, without which a raw count says nothing about rate.
- Whether new staff are assigned differently — different runs, different partners, different hours.
- Whether the shift effect is fatigue, staffing, call mix, or the fact that fewer supervisors are on at night.
Which sheet surfaces it
The patterns
It scores a pattern inside its own group rather than across the pooled log, which is the only way a tenure or shift comparison means anything.
What to ask before you act
- Do you have exposure — hours or shifts worked — for each group you want to compare?
- Are new staff assigned the same work as everyone else?
- If the difference is real, is it about the people or about what they are sent to?
These are questions, not findings. Whether any control changes anything is settled by what happens next, not by the analysis that suggested it.