The fulfillment of customer’s need depend on the existence and
performance of certain product attributes. There are some requirements
that bring more satisfaction to customer than others.
By quoting an example of TV sets, Tontini (2007) states that TV sets
have achieved higher degree of reliability in market until this time
so improving this reliability above the current level will bring less
satisfaction than improving other requirements, like image quality,
sound or connectivity etc. Therefore, it is important to determine
the requirements of a product attributes that bring more satisfaction
than others.