Instruction 18-1
Below is the number of defective items from a production line over 20 consecutive morning shifts.
$$\begin{array} { | l | l | l | l |}
\hline \text { Day } & \text { Nonconf. } & \text { Day } & \text { Nonconf. } \
\hline 1 & 26 & 11 & 22 \
\hline 2 & 27 & 12 & 26 \
\hline 3 & 23 & 13 & 21 \
\hline 4 & 21 & 14 & 22 \
\hline 5 & 26 & 15 & 19 \
\hline 6 & 20 & 16 & 17 \
\hline 7 & 35 & 17 & 21 \
\hline 8 & 30 & 18 & 18 \
\hline 9 & 21 & 19 & 16 \
\hline 10 & 25 & 20 & 17\
\hline
\end{array}$$ Note: Nonconf. = Nonconformances
-Referring to Instruction 18-1,based on the c chart,there appears to be a special cause of variation in the process.

Question

Instruction 18-1
Below is the number of defective items from a production line over 20 consecutive morning shifts.
 $$\begin{array} { | l | l | l | l |} 
\hline \text { Day } & \text { Nonconf. } & \text { Day } & \text { Nonconf. } \
\hline 1 & 26 & 11 & 22 \
\hline 2 & 27 & 12 & 26 \
\hline 3 & 23 & 13 & 21 \
\hline 4 & 21 & 14 & 22 \
\hline 5 & 26 & 15 & 19 \
\hline 6 & 20 & 16 & 17 \
\hline 7 & 35 & 17 & 21 \
\hline 8 & 30 & 18 & 18 \
\hline 9 & 21 & 19 & 16 \
\hline 10 & 25 & 20 & 17\
\hline
\end{array}$$ Note: Nonconf. = Nonconformances
-Referring to Instruction 18-1,based on the c chart,there appears to be a special cause of variation in the process.

Quizplus · Accepted Answer

The c chart is used to monitor the number of nonconformances (defects) in a process, and it assumes a stable process with only common causes of variation. If there is a special cause of variation present, it will show up as a point outside the control limits or a pattern in the data. Without seeing the actual chart, we cannot say for certain, but based on the statement that "there appears to be a special cause of variation in the process," we can infer that there is evidence of a special cause, which would make the answer A true.

Instruction 18-1 Below Is the Number of Defective Items from a Production

Instruction 18-1
Below Is the Number of Defective Items from a Production