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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