Heuristic violations | Severity 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) | 7 | 1 | 1 | ||
User control and freedom (n = 3) | 3 | ||||
Consistency and standards (n = 13) | 5 | 8 | |||
Error prevention (n = 2) | 1 | 1 | |||
Recognition rather than recall (n = 60) | 60 | ||||
Help users recognise, diagnose and recover from errors (n = 1) | 1 | ||||
Help and documentation (n = 4) | 2 | 1 | 1 |