Table 6E.8 shows 15 additional samples for the piston ring process (Table 6.3), taken after the initial control charts were established. Plot these data on the x and R chart developed in Exercise 6.15. Is the process in control?
Answer to relevant QuestionsControl charts on and s are to be maintained on the torque readings of a earing used in a wingflap actuator assembly. Samples of size n = 10 are to be used, and we know from past experience that when the process is in ...Parts manufactured by an injection molding process are subjected to a compressive strength test. Twenty samples of five parts each are collected, and the compressive strengths (in psi) are shown in Table 6E.12. (a) Establish ...Control chart for x and R are maintained on a process. After 20 preliminary subgroups each of size 3 are evaluated, you have the following data: (a) Set up control charts using these data. (b) Assume that the process ...Table 6E.15 contains 10 new subgroups of thickness data. Plot this data on the control charts constructed in Exercise 6.26(a). Is the process in statistical control? 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 ...
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