The same production line produces three types of parts (A,B, and C). The target

Question

The same production line produces three types of parts (A,B, and C). The target value of each type of part is 100, 200, and 2000, respectively. The target values and average ranges (for sample size of 4) are given in the table below. We would like to make DNOM control charts

Assuming the standard deviation of each type of part is not the same, the standardized DNOM X_bar chart has the following control limits:

UCL = A2 = 0.729

CL = 0

LCL = -A2 = -0.729

For a new sample of size 4 below, what can you say about it on the standardized DNOM X_bar chart?

(a) The new sample is in control

(b) The new sample is out of control

(c) Cannot calculate based on the information above

Explanation / Answer

For new sample of size 4 below on the standardized DNOM we Cannot calculate based on the information above

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