Question: A Quality Analyst wants to construct a control chart for determining whether five machines, all producing the same product, are under control with regard to

A Quality Analyst wants to construct a control chart for determining whether five machines, all producing the same product, are under control with regard to a particular quality variable. Accordingly, four units of putputs from each machine are collected:

Machine Measurement 1 Measurement 2 Measurement 3 Measurement 4
M1 112 113 116 112
M2 110 108 124 118
M3 123 117 110 125
M4 108 122 116 120
M5 118 116 127 121

Does this process appear to be out of control? If yes, identify a machine using the factors of three sigma control limits.

a.M2

b.Process is in Control

c.M1

d.M4

e.M5

f.M3

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