Reference no: EM133450669

Question

Krombach Auto Corporation, a German manufacturer of cars, investigates their steering wheel attachment process. A steering wheel needs some "Spiel", a small range where moving the steering wheel does not turn the tires. This increases driving safety, as not every small movement by the often nervous driver is picked up by the car. However, if the Spiel is too large, drivers will feel uncomfortable and have the impression that the car does not react to their action. Krombach estimates that a Spiel of less than 1 degree is too little and causes too much nervousness. They also estimate that a Spiel of more than 3 degrees is too much and causes concern with the drivers. The steering wheel attachment process results in a Spiel with a mean of 1.7 degrees and a standard deviation of 0.4 degrees. Is the process capable according to the traditional Cpk definition of process capability?