Prior to attempting these problems, you should try to solve # 3, 5, 15 and 17 in the text. The answers for these problems are in the back of the book. M9_P1. In this problem, you will be provided with 5 SPC charts and you will be asked to analyze them to determine if there are any areas of concern regarding whether the process in control. Review the following information and use it as a guide to solve this problem (from pp. 414-415). Interpretation: a) Normal behavior - process is in control b) One or more data points fall below LCL or above UCL - process is out of control c) Five or more data points fall above or below the center line - process is out of control d) Data is erratic and not close to centerline - process is out of control e) There is a general upward or downward trend in the data of at least 5 points - process is out of control. Note: There do not have to be five consecutive points that either increase or decrease. At the initial point where the trend begins there should be at least five points that are either greater or less than that initial point that

indicates the start of the trend. f) There is a shift in the data - process is out of control