Text: In addition to using engineering prototypes during the product integration phase of product development, Cummins and other companies we visited used other prototypes-such as production representative prototypes-in the remaining product development phases before production, as shown in table 4, to demonstrate product reliability and process control.
Entailment: Cummins employed engineering prototypes during their product development.
Contradiction: Cummins did not use engineering prototypes in its product development.