Question: Consider the x and R chart that you established in
Consider the x and R chart that you established in Exercise 6.15 for the piston ring process. Suppose that you want to continue control charting piston ring diameter using n = 3. What limits would be used on the x and R chart?
Answer to relevant QuestionsControl charts for x and R are maintained for an important quality characteristic. The sample size is n= 7; x and R are computed for each sample. After 35 samples we have found that (a) Set up x and R charts using these ...Reconsider the situation described in Exercise 6.1. Suppose that several of the preliminary 20 samples plot out of control on the R chart. Does this have any impact on the reliability of the control limits on the x chart? Suppose that following the construction of the x and R control charts in Exercise 6.34, the process engineers decided to change the subgroup size to n = 2. Table 6E.16 contains 10 new subgroups of thickness data. Plot this ...Reconsider the data from Exercise 6.42 and establish x and R charts with appropriate trial control limits. Revise these trial limits as necessary to produce a set of control charts for monitoring future production. Suppose ...Statistical monitoring of a quality characteristic uses both an x and s chart. The charts are to be based on the standard values m = 200 and sx = 10, with n = 4. (a) Find three-sigma control limits for the s chart. (b) Find ...
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