SPC Charts Are Used Extensively in Different Business and Decision-Making

SPC Charts are used extensively in different business and decision-making environments.  In this example a vendor is being selected based on speed of delivery. Which of the conclusions would help you pick a vendor for your needs regarding lead-time of delivery from your vendors? (Note: There are 4 correct answers) .

A) Vendor A with a much shorter lead time in delivery
B) Vendor B as it has a better consistency (lower variance) on lead time
C) Vendor B as Vendor A shows a situation out of control as shown in red
D) Vendor B as the Control Limits are much narrower than Vendor A
E) Vendor B with higher lead time, but a process with much narrower Control Limits

Correct Answer:

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