1. A finishing process packages assemblies into boxes. You have noticed variability in the boxes and desire to improve the process to fix the problem because some products fit too tightly into the boxes and others fit too loosely. Following are width measurements for the boxes.

   11.4-8 Full Alternative Text

   Using xx and R charts, plot and interpret the process.

2. For the data in Problem 13, if the mean specification is 68.5 ; .25 and the estimated process standard deviation is .10, is the process capable? Compute Cpu, Cpl, and Cpk.