Exam 3: Quality and Performance

A manufacturer embarking on a Six Sigma program sets the goal of having true Six Sigma capability for all processes by the end of the month.If their current process capability index on a key metric is less than 2.0 and the process capability ratio is 1.5,what must happen with the process standard deviation?

In acceptance sampling,when the random sample passes the buyer's incoming test (low number of defects found),the next action taken is to:

Table 5.3 -Use the information from Table 5.3.What is the upper control limit (UCL)if the bank were to use z = 2 and a sample size of 100?

The underlying statistical distribution for the p-chart is:

The defect rate for a product has historically been about 2.0%.What are the upper and lower control chart limits if you wish to use a sample size of 100 and 3-sigma limits?

Improving quality seems to be a strategic weapon in gaining market share.However,improving quality entails allocation of resources and effort.As greater effort is expended to stop defects before they occur,which one of the following costs increases?

The upper and lower specifications for a service are 10 min.and 8 min. ,respectively.The process average is 9 min.and the process capability ratio is 1.33.What is the process standard deviation?

A metal-cutting operation has a target value of 20 and consistently averages 19.8 with a standard deviation of 0.5.The design engineers have established an upper specification limit of 22 and a lower specification limit of 18.Which statement concerning this process is TRUE?

Process capability determines whether a process is capable of producing the product or services that customers demand.

If an x-bar chart is constructed using the data in Table 5.4,what conclusion can be reached?

In acceptance sampling,the proportion defective that the buyer will allow in an incoming shipment is:

A company is interested in monitoring the average time it takes to serve its customers.An appropriate control chart would be:

Regarding control charts,changing from two-sigma limits to three-sigma limits:

A professor records the number of students who complain each week throughout the semester.If the class size is forty students,what are 3-sigma control limits for this class? Construct a control chart and interpret the data.

In acceptance sampling,the ________ is the proportion defective that the buyer will allow in an incoming shipment.

________ costs arise when a defect is discovered after the customer has received the product or service.

An example of an internal failure cost would be warranty cost.

The process and R-charts are developed using a sample size of 5,but the technician mistakenly looks up A2,D3,and D4 values for a sample size of 7.If these charts are put into daily use,the manufacturer will mistakenly ship more bad product than had the charts been constructed correctly.

Among the seven criteria in the Baldrige Performance Excellence Program,which has the greatest weight in scoring?

On a control chart,a type I error occurs when the employee concludes that the process is in control when it is actually out of statistical control.