please paraphrase the following paragraph: 1) The process is in a state of stati
ID: 464746 • Letter: P
Question
please paraphrase the following paragraph: 1) The process is in a state of statistical control means that assignable or special causes of variation have been removed; characteristic parameters like the mean, standard deviation, and probability distribution are constant; and process behavior is predictable. One implication is that any improvement in process capability will require a change in material, equipment, method etc. 2)Relative to the control chart, the type I error represents the probability of concluding the process is out of control when it is not, means a plot point is outside the control limits when in fact the process is still in control. In process operation, high frequencies of false alarms could lead to excessive investigation costs, unnecessary process adjustment and lack of credibility for the method. The type II error represents the probability of concluding the process is in control, when actually it is not; this results from a plot point within the control limits even though the process mean has shifted out of control. The effect on process operations of failing to detect an out-of-control shift would be an increase in non-conforming product and associated costs.Explanation / Answer
The meaning of the process being in a state of statistical control means the removal of assignable or special causes of variation; the constant factors, in this case, are characteristic parameters like the mean, standard deviation, and probability distribution; and process behaviour is predictable. There is an inherent connotation that there is a requirement of a change in material, equipment, method etc for any improvement in process capability.
2) The probability of concluding the process is out of control when it is not is represented by the type I error. This is relative to control chart and it also signifies the placement of a plot point outside the control limits when in actuality the process is still in control. Process operation states that excessive investigation costs, unnecessary process adjustment and lack of credibility for the method can occur through process operation and high frequencies of false alarm. The probability of concluding the process is in control while it really is not is represented by the type II error and this results from a plot point within the control limits. This might occur even though there has been an occurrence of shift out of control for the process mean. The increase in 'non-conformity' product and associated costs is caused by the effect on process operations caused by the failure to detect an out-of-control shift.
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