Attendance rate

The share of registrants who actually walked through the door, calculated as people checked in divided by people registered. It is the exact inverse of the no-show rate, and it is the number that lets you stop guessing: on your first event you assume a rate, on every event after that you measure one. The catch is that you only ever get it if you check people in properly, so the check-in table is not only a queue-management job, it is your data collection. It is also a number sponsors care about, since a report promising a full room and delivering half of one is the fastest way to lose a renewal.

Source: Standard event measurement. The DevOpsDays Organizing Guide states the definition plainly when warning about free tickets: “your actual attendance rate (i.e., checked-in people vs tickets sold) will be lower than if people pay for them” (devopsdays.org/organizing). Luma tracks the same funnel from page views through registration to who showed up, and stores check-in separately from registration status (Luma help, event insights).

First used in: 2.2 · Registration ops: the no-show math.