Exam 6: Quality and Process Improvement

Table 6.1 Factors for Calculating Three-Sigma Limits for the -chart and R-chart Source: 1950 Manual on Quality Control of Materials,copyright American Society for Testing Materials.Reprinted with permission. -A milling operation has historically produced an average thickness of 0.005 inch with an average range of 0.015 inch.Currently,the first three items from each batch of 20 are inspected.Use Table 6.1.What is the value of the LCL ?

The implementation of a total quality management program will most likely result in a(n)

The concept of quality at the source means that

Table 6.3 -Samples of 100 checks each were taken at a bank from an encoding machine (which records the amount of a check)over a five-day period.Details are summarized in the Table 6.3.If the bank were to use the average proportion defective from these five samples as the central line for a process control chart,what would be the central line?

Continuous improvement is a philosophy that

Which one of the following techniques will help management trace customer complaints directly to the operations involved?

In applying quality control charts,a sample statistic that falls outside the UCL and LCL indicates the process is exhibiting common causes of variation.

A product has five major components with individual reliabilities of 0.95,0.98,0.97,0.98,and 0.99.What is the reliability of the product?

Which one of the following statements is most consistent with the concept of total quality management?

Deming argued that the vast majority of quality problems can be attributed to managers or the systems they put in place,not with the employees that must do their work according to these systems.

Firms should avoid having errors or defects caught and corrected at the source.

Historically,the average time to service a customer complaint has been 3 days and the standard deviation has been 0.50 day.Management would like to specify the control limits for an -chart with a sample size of 10 and 3 sigma limits.The LCL for the chart would be

Customers assess quality solely on the basis of how goods and services conform to design specifications and associated operating characteristics.

Which one of the following statements is TRUE?

Historically,the average proportion of defective bars has been 0.015.Samples will be of 100 bars each.Construct a p-chart using z = 3.What is the value of UCL?

Historically,the average time to service a customer complaint has been 3 days and the standard deviation has been 0.50 day.Management would like to specify the control limits for an -chart with a sample size of 10 and 3 sigma limits.Suppose the next sample of 10 yielded the following result: 3.2,2.1,3.6,2.8,3.9,3.5,2.7,4.1,2.6,and 3.3.What conclusion can be drawn?

The central line on a p-chart is 0.50 with an UCL of 0.65 and a LCL of 0.35.The results of the next six samples are 0.60,0.37,0.45,0.48,0.53,and 0.62.What should you do?

One function of control charts for variables is to monitor the mean of the process distribution.

Appraisal costs are associated with preventing defects before they happen.

________ teams address issues of paramount concern to management,labor,or both.