What do we call an overbooking?
Short answerPeople use several names for the same problem. Overbooking means accepting more than capacity, often on purpose. Double booking means two commitments for one slot, usually by mistake. A conflict or overlap is what a system flags. Oversell is the term for inventory or tickets sold beyond what exists.
The explanation
Overbooking is the planned version. A clinic books ten patients for eight slots because it expects two no-shows. Double booking is the unplanned version, where two entries land on the same person without anyone noticing.
Scheduling software tends to say conflict or overlap. A conflict warning appears when a new job collides with an existing one for the same resource. Oversell shows up in booking systems that sell limited seats or classes, when more tickets are issued than seats.
Knowing the words helps when you read a vendor page or a support thread. Ask whether a tool warns about conflicts, blocks them, or lets you override. Those are three different behaviors, and the right one depends on whether you ever want to overbook on purpose.
What to watch for
- Mixing up planned and accidental overlaps in reports.
- Calling a planned overbooking an error in reports.
How Apex does it
In progress
Part of this is built. The rest is not. Status as of 2026-10-07; the badge shows the least-built feature involved.
Apex is designed to warn about overbooked days, support capacity-based booking for classes and keep a waitlist for full times. These pieces are demo screens or in progress and do not save live data yet.
- SC39Overtime / overbooked warning(Rolling out)
- BK17Group classes / capacity-based booking(In progress)
- BK18Waitlist with auto backfill(In progress)
Apex Flow Scheduler is in early access. See how we label status.
Where this question comes from: owners type it, or a close variant, into search boxes. It was returned by public search suggestions (Google, Bing or DuckDuckGo) when we collected them on 2026-10-06. We do not have search volumes.