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From here you can navigate the site based upon the established ISO-25010 tree structure. Clicking a node leads to the corresponding Q42 description.

ISO 25010 -2023 3.1 Functional suitablility 3.1.1 Functional completeness 3.1.2 Functional correctness 3.1.3 Functional appropriateness 3.2 Performance efficiency 3.2.1 Time behaviour 3.2.2 Resource utilization 3.2.3 Capacity 3.3 Compatibility 3.3.1 Co-existence 3.3.2 Interoperability 3.4 Interaction capability 3.4.1 Appropriateness recognizability 3.4.2 Learnability 3.4.3 Operability 3.4.4 User error protection 3.4.5 User engagement 3.4.6 Inclusivity 3.4.7 User assistance 3.4.8 Self-descriptiveness 3.5 Reliability 3.5.1 Faultlessness 3.5.2 Availability 3.5.3 Fault tolerance 3.5.4 Recoverability 3.6 Security 3.6.1 Confidentiality 3.6.2 Integrity 3.6.3 Non-repudiation 3.6.4 Accountability 3.6.5 Authenticity 3.6.6 Resistance 3.7 Maintainability 3.7.1 Modularity 3.7.2 Reusability 3.7.3 Analysability 3.7.4 Modifiability 3.7.5 Testability 3.8 Flexibility 3.8.1 Adaptability 3.8.2 Scalability 3.8.3 Installability 3.8.4 Replaceability 3.9 Safety 3.9.1 Operational constraint 3.9.2 Risk identification 3.9.3 Fail safe 3.9.4 Hazard warning 3.9.5 Safe integration