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MP3-player (Usability (Operability (The payer have 5 buttons to manage all…
MP3-player
Usability
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User interface aesthetic
A user can play, delete songs
Learnability
Every person who can read and whose thinking abilities is OK can learn how to perform main (according to the manual) function of the player in no more than 1 month
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Maintainability
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Analysability
f the memory of the player is full (only 10 MB left) - a warning message will appear and ask a user to delete some data. Only after freeing up at least 20 MB, the device will let the user play music
Modularity
It is possible to change player's cover to another one with a different color with no impact on the player at all
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Functional suitability
Functional correctness
When user select the song and press play, the song should be played
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Reliability
Maturity
If the player is used according to the user's manual, it'll work as expected (according to the manual) for at least 8,000 hours of operation, but no more than 8 years from the day of purchase
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