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Table 3 ISONORM 9241/110-S evaluation (n=40, range from 1 (very bad) to 7 (very good))

From: Ensuring usability of future smart energy control room systems

Factor Aspect Mean SD Median Sum
Suitability for tasks Integrity 5.1 1.19 6.0 16.3
  Streamlining 5.5 1.18 6.0  
  Fitting 5.7 0.85 6.0  
Self-descriptiveness Information content 5.3 1.14 6.0 14
  Potential support 4.5 1.41 5.0  
  Automatic support 4.2 1.66 4.0  
Conformity with user expectations Layout conformity 5.7 1.21 6.0 16.8
  Transparency 5.3 1.37 5.5  
  Operation conformity 5.8 1.12 6.0  
Suitability for learning Learnability 4.0 1.47 4.0 11.7
  Visibility 4.1 1.53 4.0  
  Deductibility 3.7 1.52 4.0  
Controllability Flexibility 5.3 1.33 5.5 16.6
  Changeability 5.7 1.23 6.0  
  Continuity 5.6 1.53 6.0  
Error tolerance Comprehensibility 5.0 1.30 5.0 14.2
  Correct ability 5.0 1.12 5.0  
  Correction support 4.2 1.51 4.0  
Suitability for individualisation Extensibility 3.8 1.85 4.0 13
  Personalisation 4.6 1.91 5.0  
  Flexibility 4.6 1.81 5.0