Questions from Total Quality Management

Q: Consider the data on call waiting time of customers in a call

Consider the data on call waiting time of customers in a call center. The call center has set a goal of waiting time not to exceed 35 seconds. (a) Test to see (using α =0.05) if conducting capability...

Q: A cylindrical piece is used in an assembly in which the weight

A cylindrical piece is used in an assembly in which the weight is to be controlled. The tolerances on diameter and height, on the basis of five observations, are 2 ±0.06 cm and 6 ±0.06 cm, respectivel...

Q: In solar cells, the exposed surface area is the characteristic of

In solar cells, the exposed surface area is the characteristic of interest. The tolerances on the length and width of the cells are 4 ±0.06 cm and 5± 0.09 cm, respectively. Assuming these dimensions t...

Q: The body mass index (BMI) is a measure of obesity

The body mass index (BMI) is a measure of obesity and equals a person’s weight (in kilograms) divided by the height (in meters) squared. For a certain diagnosis related group of 20 patients, the follo...

Q: Find the sample size required for two-sided nonparametric statistical tolerance

Find the sample size required for two-sided nonparametric statistical tolerance limits for the viscosity of a grease used as a lubricant. It should contain 99% of the population with a probability of...

Q: Refer to Exercise 9-39. Find the sample size needed

Refer to Exercise 9-39. Find the sample size needed to construct a one-sided lower nonparametric statistical tolerance limit. It should contain 90% of the population with a probability of 0.95. How wi...

Q: Refer to Exercise 9-33 on the order completion time of

Refer to Exercise 9-33 on the order completion time of a logistics firm. Upon conducting a methods study of the various operations, the firm was able to reduce the mean times of operation 1 to 5.8 hou...

Q: A transistor has an exponential time-to-failure distribution with

A transistor has an exponential time-to-failure distribution with a constant failure rate of 0.00006/hour. Find the reliability of the transistor after 4000 hours of operation. What is the mean time t...

Q: An electronic component in a video recorder has an exponential time-

An electronic component in a video recorder has an exponential time-to-failure distribution. What is the minimum mean time to failure of the component if it is to have a probability of 0.92 of success...

Q: An OEM in the automobile industry is considering an improvement in its

An OEM in the automobile industry is considering an improvement in its order processing system with its tier 1 suppliers. Discuss appropriate measures of quality. What are some special and some common...