Software Diagnostics Institute

These are patterns of abnormal software behaviour that affect software users and trigger the application of pattern-oriented software diagnostics and debugging if necessary. The initial list of relevant elementary patterns include:

1. Functional
   • Use-case Deviation
2. Non-functional
   • Crash
   • Hang (includes delays^*)
   • Counter Value (includes resource leaks, CPU spikes)
   • Error Message

^* In choosing the pattern vocabulary we decided to use ordinary names, for example, Hang was chosen instead of Response Delay.