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shelfware
subject			fact

shelfware	has definition Software that is not used
	is a subtopic of 4.6 - Some Techniques for Gathering and Analyzing Requirements
	is a kind of bad software
	may be produced if the software engineer does not realize what customers and users consider to be their very basic needs
bad software	can be easily created by an inadequately trained software developer
	is difficult to understand and modify
	is poorly designed
	may partly work
software	can be easily duplicated
	can have usability without utility^2
	can have utility without usability
	deteriorates as it is changed repeatedly
	does not wear out with use like other engineering artefacts
	has quality which is only as good as its lowest-quality reusable component
	is designed usually for human beings to use
	must be designed with users' input otherwise it may not be usable
	often has a poor design and is steadily becoming worse

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