Description
Attached is a problem dealing with a drilling operation (time can be measured). Please note the # of sample periods and # of observations in each sample period. The data is presented horizontally instead of Vertically. Xbar (mean/avg) and R (dispersion) are done for you for each sample period. You need to calculate X double bar and R bar, determine Upper and Lower control limits, and determine if the operation is in control looking at average (Xbar) and dispersion (R). Put your answers on the answer sheet.
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Chapter 10 Drilling Operation Problem – Answer Sheet
X double bar _______________
R bar
________________
UCL x bar
_______________ Show calculation: ____________________________
LCL x bar
_______________ Show calculation: ____________________________
UCL R
_______________ Show calculation: ____________________________
LCL R
_______________ Show calculation: ____________________________
Using X bar, Is the process in control ______________________ If not, what is the problem
_____________________________________
Using R, Is the process in control ______________________ If not, what is the problem
_____________________________________
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