ABSTRACT
It was previously discussed that initial product prototypes need to be tested to identify how
closely engineered product variables match consumer needs and perceptions to find out
what is wrong with the design. The prototype testing, evaluations, and consumer input should
be used to fix what is wrong. Any one of those wrong attributes can overcome consumer
appreciation for any number of positive quality attributes. There will be trade-offs when all
product quality variables are considered, and this process is called engineering optimization.
