Mobile Apps Designer Question:

Severity refers to the consequence of a bug or a fault within an application and how serious that fault really is. Severity is something that an app developer must always be aware of. It tells a developer how serious a bug is when it comes to an app’s functionality. On the other hand, priority refers to how important a bug is with respect to customers.

For instance, Apple may one day realize that its Calendar application has certain bugs that are high in ‘severity’. The users may not realize it, but the Calendar app on the iOS platform may have certain security issues. On the other hand, when iPhone’s battery heats up after a software update, it is high on a customer’s priority. One cannot say which one is more important than the other.

One can rather put it this way: as an app developer, you must constantly be looking for a bug’s severity, whether you receive complaints or you don’t. On the other hand, peering through all the consumer feedback helps you to assign priority to certain bugs.