Construct x-bar and r-bar charts for the data

timer Asked: Apr 16th, 2015
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Question description

General Dynamics, Inc. is a manufacturer of hydraulic machine tools. It has had a history of leakage trouble resulting from a certain fitting. 25 samples of machined parts were selected, one per shift, and the diameter of the fitting was measured.

a) Construct a X-bar and R chars for the data provided in the following Excel file.

b) What do you think of the results?

c) If the regular machine operator was absent when sample 4, 8, 14 and 22 were taken, how will the results in part b be affected?

d) A second table in the worksheet represents measurement taken during the next ten shifts, after the operator was back. What information does this table provide to the quality control manager?

X-Bar and R Chart for General Dynamics

Tutor Answer

Carnegie Mellon University

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Outstanding Job!!!!

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