Heuristic violations | Programme components | Severity index | ||||
---|---|---|---|---|---|---|
0 No usability problem | 1 Cosmetic problem | 2 Minor usability problem | 3 Major usability problem | 4 Usability Catastrophe | ||
Visibility of system status (n = 5) | I | |||||
A | 5 | |||||
E | ||||||
Match between system and real world (n = 9) | I | 1 | ||||
A | 7 | 1 | ||||
E | ||||||
User control and freedom (n = 3) | I | 2 | ||||
A | ||||||
E | 1 | |||||
Consistency and standards (n = 13) | I | 8 | ||||
A | 5 | |||||
E | ||||||
Error prevention (n = 2) | I | 1 | ||||
A | 1 | |||||
E | ||||||
Recognition rather than recall (n = 60) | I | |||||
A | 60 | |||||
E | ||||||
Help users recognise, diagnose and recover from errors (n = 1) | I | 1 | ||||
A | ||||||
E | ||||||
Help and documentation (n = 4) | I | 2 | 1 | |||
A | 1 | |||||
E |