32 Control limits come from Review Later Engineering specifications Customer expectations Supplier capability Common cause process variation 31 Review Later An x and R chart was prepared for an operation using twenty samples with five pieces in sample. x was found to be 33.6 and R was 6.2. During production a sample of five was taken and the pieces measured 36, 43, 37, 25, and 38. At the time the sample was taken Only the range was outside control limits Neither the average nor range were within control limits Only the average was outside control limits Both the average and range were within control limits 30 Review Later Check sheets have been called which of the following? 1. Visual II. Complex III. Easy to use and interpret IV. Easy to organize data V. A complete waste of time III, IV, V I, III, IV, V I, III, IV I, II, III, IV, V