Nels Neugent, Purchasing Manager at Pacific Medical Center, is designing a c chart to monitor the number of nonconformances per purchase order issued at Pacific.The total number of nonconformances for 30 purchase orders is 45.The lower control limit for Nels's c chart is ___.
A)0.00
B)-2.17
C)1.03
D)0.94
E)1.00

Question

Quizplus · Accepted Answer

The lower control limit (LCL) for a c chart is calculated as c - 3√c, where c is the average number of nonconformances per purchase order. Here, c = 45/30 = 1.5. LCL = 1.5 - 3√1.5 = 1.5 - 3(1.22) = 1.5 - 3.66 = -2.16. Since LCL cannot be negative, it is set to 0.00.

Nels Neugent, Purchasing Manager at Pacific Medical Center, Is Designing