Table 2: Severity of heuristic evaluations by programme components
Heuristic violationsProgramme componentsSeverity 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
A5
E
Match between system and real world (n = 9)I1
A71
E
User control and freedom (n = 3)I2
A
E1
Consistency and standards (n = 13)I8
A5
E
Error prevention (n = 2)I1
A1
E
Recognition rather than recall (n = 60)I
A60
E
Help users recognise, diagnose and recover from errors (n = 1)I1
A
E
Help and documentation (n = 4)I21
A1
E