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Usability

Usability
      Usability measures how well a person can experience an interface.  This includes organization and having the necessary help menus.  Usability is essential to a persons experience simply because if a website or system is unusable, then the consumers will be unable to use it, which makes the website or system rather pointless, ineffective, and useless.

  • Learnability
    • Learnability determines how quickly a user can perform simple things on the interface during their first experience with it.  This ®refers to when the design is predictable and consistent throughout the website.  
  • Efficiency 
    • Efficiency encompasses how rapidly a user performs tasks on an interface after they have learned.  While this may sound ridiculously similar to learnability, it differs in that learnability refers to a user's original interactions with the interface while efficiency is about the effort required throughout multiple visits to the interface.  
  • Memorability 
    • Memorability helps users because it makes it so that they are spared the effort of relearning the system each time that they return to it.  
  • Satisfaction
    • Satisfaction focuses on how enjoyable the experience is for the user.  The user's satisfaction is essential to usability and an interface's success because clearly if one doesn't enjoy a website, they'll avoid it.
  • Error Management
    • Error management strives to decrease the number of errors made, decrease the severity of the inevitable errors, and makes errors easier to recover from.  

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