Exam 18: Statistical Quality Control

Imagine a cause-and-effect diagram had five elements listed at the end of each line, either at the head of the diagram or at the end of each "bone" of the diagram.These elements were transportation, enforcement, late arrivals, policy, and attitude.Of these, which would be most likely to be at the head of the diagram?

Which of the following quality control chart conditions is an indicator that the process is potentially out-of-control?

You are conducting a study on the blood glucose levels of 9 patients who are on strict diets and exercise routines.To monitor the mean and range of the blood glucose levels of your patients, you take a blood glucose reading every day for each patient for 20 days.The mean of the 9 sample means is 101.03, and the mean of the 9 standard deviations is 29.243.The lower control limit for your $\bar { x }$ chart is ________.

Sarah Soliz, Director of Quality Programs, is designing $\bar { x }$ and R charts for the rod shearing process at Stockton Steel.She has 26 samples of rod length, and each sample included measurements of 5 rods.The mean of the 26 sample means is 112 inches, and mean of the 26 ranges is 0.15 inch.The upper control limit for her R chart is ____.

A flowchart can help identify ___________ within the ____________.

In reviewing a flowchart, a company would not be able to determine ____________ in a process.

A p chart is to be developed for use in quality control.The value of p is calculated to be 0.54.The sample size is 249.What would the upper control limit be?

You are conducting a study on the blood glucose levels of 9 patients who are on strict diets and exercise routines.To monitor the mean and range of the blood glucose levels of your patients, you take a blood glucose reading every day for each patient for 20 days.The results are shown below. Day Mean Range Day Mean Range 1 92.11 80 11 100.70 89 2 90.67 77 12 96.67 77 3 89.44 73 13 97.33 75 4 93.33 81 14 95.89 80 5 89.44 71 15 98.89 68 6 110.20 90 16 101.22 88 7 104.10 120 17 107.33 81 8 108.20 93 18 108.00 95 9 107.70 98 19 106.89 77 10 112.70 145 20 109.89 80 The lower control limit for your $\bar { x }$ chart is ________.

Control charts are used to examine the output of a process for disturbing patterns or for data points that indicate that the process is out of control.

A flowchart does not include ______.

A p chart is to be developed for use in quality control.The value of p is calculated to be 0.05.The sample size is 50.What would the upper control limit be?

W.Edwards Deming was a quality guru whose principles of quality management can be summarized through four basic tenets, or "Absolutes".

Two general types of control charts are (1)control charts for measurements and (2)control charts for compliance items.

Six sigma ______.

The Six Sigma approach essentially calls for the process to approach defect-free status.

Jack Joyner, Director of Quality Control at Covington Castings (CC), is designing a c chart to monitor the number of nonconformances per aluminum casting produced at CC.The total number of nonconformances for 26 castings is 91.The upper control limit for Jack's c chart is ___________.

Nels Neugent, Purchasing Manager at Mid-West Medical Center, is designing a p chart to monitor the proportion of defective purchase orders issued at Mid-West.He has the proportion of defective orders for 22 samples of purchase orders.Each sample contains 150 purchase orders, and the average proportion defective is 0.08.The centerline for Nels's p chart is ___________.

For a p chart, the standard deviation of the proportions is 0.079057.The number of items in each sample is 30.Then p is ______.

According to the following Pareto chart, the most common complaint was ______.

Working from a Pareto chart, a company wants to address the two most common causes of interruptions in the company's production process.Managers should focus on the _____________ of the chart.