Open Shift Management: Fill Roster Gaps Faster in 2026

Serial Versus Parallel

The traditional way of filling a gap is a phone-around, and the reason it is slow is structural rather than a reflection on the manager.

You ring your most reliable casual. No answer. You leave a message and ring the next. She is at another job. Third person says yes but only until two. Meanwhile you are also supposed to be opening, or driving, or doing handover, and you are holding a mental list of who you have already tried and who has already worked a lot of hours this week.

Every one of those calls happens after the previous one finishes. Ten workers contacted in sequence takes as long as ten conversations, and no amount of being organised changes that, because the bottleneck is the method.

Broadcasting to all ten at once removes the sequence. That is the entire mechanism, and everything else about open shift software is detail.

The second thing it produces is quieter but arguably more valuable: a record. The phone-around leaves nothing behind. Who was offered the shift, in what order, who declined, all of it lives in the manager's memory and evaporates within a week. That absence becomes a problem only occasionally, and when it does it is usually a dispute about favouritism, which is exactly the situation where you want evidence rather than recollection.

How the Workflow Runs

Create the open shift. Either the shift already exists and its worker has dropped out, in which case the detail carries over, or you are adding coverage. Set who it goes to, since offering every shift to everybody trains people to ignore the notifications.

Broadcast to eligible staff. Eligibility is the useful part. A worker who has marked themselves unavailable, or who is already rostered at that time, should not be receiving the offer. This is where maintaining current availability data stops being administrative and starts paying for itself, because the quality of the broadcast depends entirely on the quality of that data.

One-tap acceptance. From the notification, without navigating anywhere. Friction at this step is what determines whether a shift fills in four minutes or forty.

First acceptance takes it. The roster updates, remaining notifications are withdrawn, and the manager is told. This avoids the phone-around's most awkward moment, ringing back the person who said yes second.

Escalate if nobody takes it. Some shifts do not fill, and the system should tell you that rather than leaving you to notice. Our guide to handling last-minute sick calls sets out the escalation ladder from widening the pool through to agency cover.

How fast a shift fills depends on your pool size, the time of day, the day of the week and how appealing the shift is. A Wednesday mid-morning with twelve available casuals is quick. A 6am Sunday in a regional town may not fill at all. Any vendor quoting an average fill time, including on earlier versions of this page, is making it up.

Open Shifts and Shift Swaps Are Different Tools

The last row is the one worth internalising. A swap is cost-neutral in hours but can change cost if the two workers sit on different rates or employment types. An open shift adds hours, and if it goes to someone already near their limit it can trigger overtime. Those are different financial events and they deserve different levels of scrutiny.

The two chain together constantly in practice. A sick call creates an open shift. A colleague takes it but needs to move their own shift the following day, which produces a swap request, which may create a second open shift. Handling both in the same place is what stops that chain being reconstructed over text messages.

GetMyRoster surfaces unassigned shifts on the roster and dashboard so a vacancy is visible rather than remembered. The free plan covers up to 5 users at a single location with the web dashboard, mobile apps, notifications and staff certificate management; the GPS time clock, shift cost breakdowns and staff availability management are paid. Offering and acceptance workflows vary between platforms, so test what yours does rather than assuming.

The Compliance Angle

Two Australian considerations make the record worth keeping.

Offering hours in the right order. Some awards and enterprise agreements require additional hours to be offered to existing employees, often part-time staff, before engaging new casuals or labour hire. If that applies to you, a broadcast log showing who was offered what and when is the evidence that you followed the order. Reconstructing it afterwards from memory is not.

Patterns of hours matter. How many additional shifts a casual accepts over time contributes to the picture of whether their work has been regular and systematic. The casual conversion framework changed under the Closing Loopholes reforms and now runs through an employee choice pathway, where an eligible employee notifies the employer that they want to move to permanent employment, with different timeframes for small business employers. Check the current Fair Work Ombudsman guidance rather than any article, since this area has moved recently and is the kind of thing that goes stale quietly.

Either way, an accurate record of hours actually worked, rather than hours originally rostered, is what those assessments rely on. See Fair Work rostering requirements for the broader obligations.

Making It Work in Practice

Do not broadcast everything to everyone. The fastest way to kill an open shift system is notification fatigue. Once staff learn that most alerts are irrelevant to them, they stop opening any of them, and the tool is worse than the phone-around because you now believe you have reached people you have not.

Keep availability current or the eligibility filter is fiction. Garbage in, irrelevant notifications out.

Watch who is accepting. If the same two people take every open shift, you have a goodwill dependency and probably a fatigue risk. It is also worth asking why the others are not responding, because the answer is sometimes that the shifts on offer are genuinely unattractive and sometimes that people did not realise they were eligible.

Check credentials separately where they matter. In regulated sectors, confirm qualification currency before publishing rather than assuming a broadcast filter has handled it. Certificate tracking flags lapsed credentials, and the obligation to deploy qualified people stays with you regardless.

Treat repeated unfilled shifts as data. A particular shift that never fills is telling you something about the shift rather than about your staff, and no notification system fixes a roster gap that exists because the work is unappealing or the pool is too small.

Who Should Get the Offer First

Broadcasting to everyone at once is fast. It is not always the right first move, and the difference matters both financially and legally.

Think of your workforce in tiers, and work outward.

Part-time staff below their maximum hours. Often the correct first tier, and sometimes the required one, because some awards and agreements direct that additional hours go to existing part-time employees before new engagements. They also tend to be the cheapest cover, since they are not yet into overtime and already know the site.

Your regular casual pool. Trained, inducted, credentialed. The bulk of gap-filling lands here.

Staff from nearby sites. Adds travel time and may attract a travel allowance under the award, so it costs more than it appears to.

Permanent staff into overtime. Reliable and expensive. Worth it for a shift that genuinely must be covered, wasteful as a first resort.

Agency. Highest cost, plus induction and credential verification before they can work. Necessary sometimes, a warning sign if frequent.

Software that lets you release an open shift to one tier, then widen it if nobody bites, is materially more useful than one that only broadcasts to everybody, because it lets the cheap and compliant options answer first. If your tool only does all-at-once, you can approximate tiers manually by releasing to a group and widening after a set interval. Clumsy, but it preserves the order.

Whatever you choose, write the order down and follow it consistently. The point is not bureaucracy. It is that a consistent, recorded order is defensible if anyone ever asks why a particular person keeps getting the extra hours, and an ad hoc order that lives in a manager's head is not, even when it was entirely fair. Related reading: casual and part-time scheduling.