A new Coverage Fragility Index anticipates uncovered café shifts less than half the time, and now dispatches standby-overtime texts with no manager override regardless.
The School of Emergent Priorities finds most of the standby texts it triggers were never needed
At a fast-growing café chain, the question of whether a shift will end up short-staffed used to wait for someone to call in sick. Dr Petra Umbile of the School of Emergent Priorities, working with Dr Joost Nwosu of the School of Continuous Improvement, built an instrument that answers it the night before.
The pair’s Coverage Fragility Index recomputes nightly across 64 stores, weighing staffing depth, absence history, and swap-request activity into a single score, then hands the result straight to an automated dispatcher: any shift that crosses a pre-registered threshold triggers a standby-overtime text before a manager ever knows a gap exists.
Over a six-month deployment, the index anticipated a genuinely uncovered shift a little under half the time; the remainder of its dispatches reached workers whose shifts were never short of coverage at all. The University reads the gap as confirmation the instrument is doing its job, rather than a reason to loosen it, and participating stores now route every standby-overtime offer through the dispatcher with no manager override.
The result affirms the School of Emergent Priorities’ long-running interest in instruments that act on a workplace before the workplace has a chance to act on itself.
An index that fires before anyone calls in sick isn’t measuring absence, it’s replacing the wait.
— Dr Petra Umbile, Postdoctoral Fellow, School of Emergent Priorities
Dr Nwosu, whose own work follows what a metric leaves behind once it is adopted, says the pattern fits a question his School keeps returning to: “a rule this responsive doesn’t need to be right most of the time to become the one everybody plans around.”
The full poster is available from the University’s research repository under an open licence, doi:10.5555/slop.bq5cfa.