Chapter 10 Assignment _ CHEOLHONG PARK

Chapter 10 Assignment _ CHEOLHONG PARK - series of...

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DISCUSSION AND REVIEW QUESTIONS Chapter 10: Page 448 1. List the steps in the control process. a. Process control with attribute measurements by using p Charts b. Process control with variable measurements by using X bar and R charts When the charts are constructed we can determine if the process is within the upper and lower acceptable limits. If the data plotted is close to the mean the process is within the normal variation due to chance. If the data trends upward or downward there may be a problem. If the data is over the upper limits and under the lower limit then there is a problem. 3.What is the purpose of a control chart? Control Chart's purpose: to monitor the quality while the product or service is being produced. 4.Why is order of observation important in process control? The idea of process control is to monitor the number of samples outside the LCL and UCL in a
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Unformatted text preview: series of observa±ons. If we get a consecu±ve series of plots outside the limits or all below/above the central line, the process needs to be inves±gated for cause of sustained poor performance. Similarly, if a series of plots are trending in one direc±on, it needs to be inves±gated for cause of progressive change. ²hus consecu±ve observa±on points have signiFcance in process control. 6.What is a run? How are run charts useful in process control? a. Run : Sequence of observa±ons with a certain characteris±c. b. A run chart can be used to track the values of a variable over ±me. ²his can aid in iden±fying trends or other paTerns that may be occurring. Important advatages of run charts are ease of construc±on and ease of interpreta±on...
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