A delivery company defines a "defect" as a package delivered later than the promised delivery time.Management wants to monitor the proportion of packages per week delivered beyond their promised delivery time.Management plans to sample 150 packages per week.The appropriate control chart is a(n):
A) -chart.
B) R-chart.
C) p-chart.
D) np-chart.

Question

A delivery company defines a "defect" as a package delivered later than the promised delivery time.Management wants to monitor the proportion of packages per week delivered beyond their promised delivery time.Management plans to sample 150 packages per week.The appropriate control chart is a(n):
A) -chart. 
B) R-chart. 
C) p-chart. 
D) np-chart.

Quizplus · Accepted Answer

Since the company wants to monitor the proportion(defectives) of packages per week and the sample size is constant(150 packages per week), the appropriate control chart is a p-chart. The p-chart is used to monitor the proportion of defectives in a sample.

A Delivery Company Defines a "Defect" as a Package Delivered