PagerDuty protects you against accidentally overlooked incidents by letting you specify comprehensive escalation rules. When an incident is triggered, PagerDuty first tries to contact the level-one engineer. If that person doesn't answer in time, PagerDuty automatically escalates the alert to the level-two engineer, and so on. You can specify as many escalation levels as you need, and the escalation delay is user adjustable. With PagerDuty, you don't need to worry about accidentally missing a critical alert.
