A feature model results from DomainAnalysis / DomainEngineering.
It covers 
	* A description of the individual features
	* The feature commonalities and variabilities of software family members
	* The dependencies between the variable features, typically visualized using a FeatureDiagram.
	* Additional information concerning particular features, such as constraints, binding sites, and priorities.

This raises the question what exactly a feature is: FODA describes it as _a prominent or distinctive user-visible aspect, quality, or characteristic of a software system_ -- a definition taken from the _American Heritage_.

Chapter 4 of GenerativeProgrammingBook contains an extensive description of feature models.
 
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CategoryDomainEngineering | Contributions by ArieVanDeursen