Question 34

The P-chart helps to monitor the proportion of defects in samples.

The P-chart is specifically designed to track the proportion of defective items in a sample, making it the ideal choice for monitoring defects over time.

A) R-chart

The R-chart is used to monitor the range of variation within a process, focusing on the dispersion of measurements rather than the proportion of defects. It does not provide information on defect levels, making it unsuitable for this question.

B) C-chart

The C-chart is utilized for counting the number of defects per unit in a sample, rather than monitoring the proportion of defects. While it tracks defects, it does not convey the proportionate relationship needed for this context.

C) S-chart

The S-chart is not a standard control chart in the context of monitoring defects and does not focus on the proportion of defective items. Its use is generally related to monitoring the standard deviation rather than defect proportions.

D) P-chart

The P-chart is specifically designed to monitor the proportion of defective items in a sample. It provides a clear view of the defect rate over time, making it the correct choice for tracking the proportion of defects.

Conclusion

The P-chart is clearly the most appropriate tool for monitoring the proportion of defects in samples, as it directly addresses the need to analyze defect rates. All other options either focus on different aspects of quality control or do not relate to defect proportions, confirming the P-chart's relevance to the question.