Best models to use in a redesign effort.

Give two best models to use in a redesign effort? Why?

Eddie is a quality control inspector for an automotive assembly line. His job is to inspect the body, interior, and engine of cars as they roll off the assembly line. Eddie’s responsibility is to identify quality problems that either hinders the functioning of these parts of the car or noticeably mar the car’s appearance. He is to report the problem so that it can be corrected. Sometimes late in the day, especially on Thursdays and Fridays, Eddie lets assembly problems slip past him. In addition, Eddie’s back feels sore at the end of the day, and sometimes he is very stiff in the morning. There are times when he is not sure whether he is seeing a serious problem or just a glitch.