Managing for Quality and Performance Excellence 10th Edition by James Evans ,William Lindsay

Exercise 84

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.
A machining process at the Mach4 Tool Co. has a required dimension on a part of 0.575 ± 0.007 inch. Dimensions of 25 parts were measured as found in the worksheet tab Prob. 8-18 in the Excel file C08Data.xlsx on the Student Companion Site for this chapter.
a. What is its capability for producing within acceptable limits?
b. Adjustments were made in the process and 25 more samples were taken and measured, as shown in the worksheet tab Prob. 8-18 in the Excel file C08Data.xlsx. What can you observe about the process? Is it now capable of producing within acceptable limits?