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\section{10 Usability Heuristics}

Nielson, Jakob. ???10 Usability Heuristics???. Nielson Norman Group. Retrieved from: \href{http://www.nngroup.com/articles/ten-usability-heuristics/}{http://www.nngroup.com/articles/ten-usability-heuristics/} . 

Based on a factor analysis of 249 usability problems, Nielson refined a set of the ten most general usability heuristics designed for maximum explanatory power. The ten are:
	\item Visibility of system status.
	\item Match between system and the real world.
	\item User control and freedom.
	\item Consistency and standards.
	\item Error prevention.
	\item Recognition rather than recall.
	\item Flexibility and efficiency of use.
	\item Aesthetic and minimalist design.
	\item Helping users recognize, diagnose, and recover from errors.
	\item Help and documentation.