Question: Control charts are used as a quality control tool to check whether the process (production or service) is in control or not. According to the

Control charts are used as a quality control tool to check whether the process (production or service) is in control or not. According to the observations plotted in the above control chart, what is your conclusion about the existence of I) natural and ) assignable variations? (4 pts) b. If the number of standard deviations in the control limits is decreased, then how would your conclusion about the existence of i) natural and ii) assignable variations change ? (4 pts) of the natural variation of a process decreases, what would happen to the process capability index given that the design specifications are fixed ? Please explain. (4 pts) Upper control limit Natural variation tzo control limit Time

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