Table 1: Severity index categories for various heuristic evaluations
Heuristic violationsSeverity index
0
No usability problem
1
Cosmetic problem
2
Minor usability problem
3
Major usability problem
4
Catastrophe
Visibility of system status (n = 5)5
Match between system and real world (n = 9)711
User control and freedom (n = 3)3
Consistency and standards (n = 13)58
Error prevention (n = 2)11
Recognition rather than recall (n = 60)60
Help users recognise, diagnose and recover from errors (n = 1)1
Help and documentation (n = 4)211