Questions from Total Quality Management

Q: The turnaround time (TAT) for a certain blood test in

The turnaround time (TAT) for a certain blood test in a laboratory in a health care facility is of interest. The mean and standard deviation of a random sample of 100 such tests are found to be 120 mi...

Q: Consider the hospitality industry. Describe special causes and common causes in

Consider the hospitality industry. Describe special causes and common causes in this setting and discuss the role of quality control and quality improvement.

Q: Explain the difference between common causes and special causes. Give examples

Explain the difference between common causes and special causes. Give examples of each.

Q: Flight delays are of concern to passengers. An airline obtained observations

Flight delays are of concern to passengers. An airline obtained observations on the average and range of delay times of flights (in minutes), each chosen from a sample of size 4, as shown in Table 7-2...

Q: In a textile company, it is important that the acidity of

In a textile company, it is important that the acidity of the solution used to dye fabric be within certain acceptable values. Data values are gathered for a control chart by randomly taking four obse...

Q: The bore size on a component to be used in assembly is

The bore size on a component to be used in assembly is a critical dimension. Samples of size 4 are collected and the sample average diameter and range are calculated. After 25 samples, we have The spe...

Q: The level of dissolved oxygen in water was measured every 2 hours

The level of dissolved oxygen in water was measured every 2 hours in a river where industrial plants discharge processed waste. Each observation consists of four samples, from which the sample mean an...

Q: Explain the rationale behind placing the control limits at three standard deviations

Explain the rationale behind placing the control limits at three standard deviations from the mean.

Q: In a gasoline-blending plant, the quality of the output

In a gasoline-blending plant, the quality of the output as indicated by its octane rating is measured for a sample taken from each batch. The observations from 20 such samples are shown in Table 7-23....

Q: Automatic machines that fill packages of all-purpose flour to a

Automatic machines that fill packages of all-purpose flour to a desired standard weight need to be monitored closely. A random sample of four packages is selected and weighed. The average weight is th...