One way to assess the quality of a bolt of fabric is to monitor the number of no
ID: 423733 • Letter: O
Question
One way to assess the quality of a bolt of fabric is to monitor the number of nonconformities found in a randomly selected ten square meters of the fabric. Assume a company uses Shewhart limits in control charting this attribute and has historically found an average of 16 nonconformities in each sample. In their most recent sample they found 25 nonconformities. What should they conclude/do.
A)Their process is in control. They should try to find out why nonconformities are unusually low and use that information to ensure that the process continues to behave in this way.
B)Their process in control and they should reward the operators because defects are so low.
C)Their process is out of control. They should try to find out what's different and use that information to prevent the process from behaving in this way.
D)The process is in control and no management response to this result is merited.
E)Their process is out of control but, since nonconformities have decreased, they shouldn't do anything about it.
A)Their process is in control. They should try to find out why nonconformities are unusually low and use that information to ensure that the process continues to behave in this way.
B)Their process in control and they should reward the operators because defects are so low.
C)Their process is out of control. They should try to find out what's different and use that information to prevent the process from behaving in this way.
D)The process is in control and no management response to this result is merited.
E)Their process is out of control but, since nonconformities have decreased, they shouldn't do anything about it.
Explanation / Answer
C)Their process is out of control. They should try to find out what's different and use that information to prevent the process from behaving in this way.
From the historically only 16 nonconformities in each sample, to now 25 in the recent one, there seems to be a marked increase in the level of conformities thereby indicating more quality lapses in the bolt of fabric. Therefore, it seems that their process is out of control and thereby steps are to be taken to examine the reasons for the same and based on such an examination, measures are to be taken to prevent the process in behaving in this manner.
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