Answers
Most processes are not in statistical control when they are first sampled for control chart purposes because of the existence of non-random variation from external factors. When processes are first sampled it is difficult to predict how the process will vary, within limits, in the future. When a process is first sampled in addition to common cause variation special cause variation is present and this causes most processes to not be in statistical control when they are first sampled for control chart purposes. When a process is being sampled for the first time they are usually not in the ideal state or in the threshold state. They are mostly in the brink of chaos state or in the state of chaos.
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