Managing for Quality and Performance Excellence 9th Edition by James Evans,William Lindsay

تمرين 78

Note: Data for many of the problems in this chapter can be found in the Excel workbook C08Data.xlsx on the Student Companion Site. Click on the appropriate worksheet tab as noted in the problem (e.g., Prob. 8-6, etc.) to access the data.
Fujiyama Electronics needs to construct
and s -charts for circuit boards that are purchased from an outside supplier. A critical dimension is the distance between two holes on the board that are supposed to be 5 cm apart. Use the data, consisting of 30 samples of size 4 found in the worksheet Prob. 8-34 in the C08Data.xlsx file. What conclusions do you reach concerning the state of the process? Is it under control? Why or why not?