Is the quality OK? Statistical control means that a process is stable. It doesntmean
Chapter 0, Problem 11.49(choose chapter or problem)
Is the quality OK? Statistical control means that a process is stable. It doesntmean that this stable process produces high-quality items. Return to themesh-tensioning process described in Examples 11.9 and 11.11. This process is incontrol with mean = 275 mV and standard deviation = 43 mV.(a) The current specifications set by customers for mesh tension are 100 to400 mV. What percent of monitors meet these specifications?(b) The customers now set tighter specifications, 150 to 350 mV. What percentmeet the new specifications? The process has not changed, but product quality,measured by percent meeting the specifications, is no longer good.
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