After getting a process into statistical control, a range chart was developed (3 sigma limits) with LCL 0 and UCL 2 50 Similarly an average chart was developed (3 sigma limits) with LCL 15 and UCL 24 Five monitoring samples subsequently taken read as follows sample ranges 1 75, 2 42, 1 82, 2 04, 2 80, and sample means 19 5, 22 3, 17 4, 20 1, 22, respectively What can you tell management from this analysis The process is not in statistical control, since both process variability and the process average need to be within their respective control limits, in order for it to be so We cannot tell anything from the data provided The process is still in statistical control since the process average is in control, although the process variability is out of control The process variability is out of control, but it is a good thing, practically speaking

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Question: After getting a process into statistical control, a range chart was developed (3-sigma limits) with LCL=0 and UCL=2.50. Similarly an average chart was developed (3

After getting a process into statistical control, a range chart was developed (3-sigma limits) with LCL=0 and UCL=2.50. Similarly an average chart was developed (3 sigma limits) with LCL=15 and UCL=24.

Five monitoring samples subsequently taken read as follows: sample ranges: 1.75, 2.42, 1.82, 2.04, 2.80, and sample means: 19.5, 22.3, 17.4, 20.1, 22, respectively.

What can you tell management from this analysis?

		The process is not in statistical control, since both process variability and the process average need to be within their respective control limits, in order for it to be so
		We cannot tell anything from the data provided
		The process is still in statistical control since the process average is in control, although the process variability is out of control
		The process variability is out of control, but it is a good thing, practically speaking

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