Contents 8. Adaptation & Evolution
How systems change over time without eroding usability or trust.
These determine whether systems remain usable as they grow.
Mission statement
Guide how systems evolve over time without eroding usability, trust, or the value of what users have already learned.
Subcategories
1.ContinuityHow understanding is preserved across updates.“Can your system change without breaking user understanding or work?”9 directives2.ScalabilityWhether patterns survive growth.“Does your interaction model remain understandable to users as it scales?”9 directives3.ObservabilityHow user behavior is measured.“Can user-visible problems in your system be detected early on?”9 directives4.ValidationHow correctness is maintained over time.“Is the design of your system continuously validated against real use?”10 directives5.PersonalizationHow the system adapts to the individual.“Does personalization in your system help each user without making the system unpredictable?”9 directives