The Importance of Simplifying Things

We very carefully watch the metric of number of successful checkouts per second. That's an incredibly good end metric that says everything is working properly. And so we're able to set alarms that say it's looking a little bit lower than expected. But generally what I've seen for the alarms on this is the alarm is not saying checkouts have ceased because that basically says everything has broken. It's more checkouts are headed towards zero.