EBK OPERATIONS MANAGEMENT
12th Edition
ISBN: 8220100283963
Author: Stevenson
Publisher: YUZU
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 4.S, Problem 13P
A manufacturer of programmable calculators is attempting to determine a reasonable free-service period for a model it will introduce shortly. The manager of product testing has indicated that 'he calculators have an expected life of 30 months. Assume product life can be described by an exponential distribution.
a. If service contracts are offered for the expected life of the calculator, what percentage of those sold would be expected to fail during the service period?
b. What service period would result m a failure rate of approximately 10 percent?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A manufacturer of programmable calculators is attempting to determine a reasonable free-serviceperiod for a model it will introduce shortly. The manager of product testing has indicated that thecalculators have an expected life of 30 months. Assume product life can be described by an exponential distribution.a. If service contracts are offered for the expected life of the calculator, what percentage of thosesold would be expected to fail during the service period?
28. An expensive piece of equipment is used in the masking operation for semi-
conductor manufacture. A capacitor in the equipment fails randomly. The capacitor
costs $7.50, but if it burns out while the machine is in use, the production process
must be halted. Here the replacement cost is estimated to be $150. Based on past
experience, the lifetime distribution of the capacitor is estimated to be
Probability of
Failure
Number of Months
of Service
1
.08
2
.12
3
.16
4
.26
5
.22
.16
How often should the capacitors be replaced in order to minimize the expected
monthly cost of planned and unplanned replacement?
1. Three hundred identical cathode ray tubes (CRTS) placed into service
simultaneously on January 1, 1976, experienced the following numbers of failures
through December 31, 1988:
1983
Year
Number of failures
1984
1985
1986
1987
1988
13
19
16
34
21
38
Assume that there were no failures before 1983.
a. Based on these data, estimate the cumulative distribution function (CDF) of a
CRT chosen at random.
Using the results of part (a), estimate the probability that a CRT chosen at
random
13.1 Reliability of a Single Component 753
b. Lasts more than 5 years.
c. Lasts more than 10 years.
d. Lasts more than 12 years.
e. That has survived for 10 years fails in the 11th year of operation.
Chapter 4 Solutions
EBK OPERATIONS MANAGEMENT
Ch. 4.5 - Prob. 1.1RQCh. 4.5 - Prob. 1.2RQCh. 4.8 - LEGO A/S IN THE PINK Lego A/S overcame the recent...Ch. 4.11 - THE CHALLENGES OF MANAGING SERVICES Services can...Ch. 4.11 - THE CHALLENGES OF MANAGING SERVICES Services can...Ch. 4.S - Prob. 1DRQCh. 4.S - Prob. 2DRQCh. 4.S - Prob. 3DRQCh. 4.S - Consider the following system: Determine the...Ch. 4.S - A product is composed of four parts. In order for...
Ch. 4.S - A system consists of three identical components....Ch. 4.S - A product engineer has developed the following...Ch. 4.S - The guidance system of a ship is controlled by a...Ch. 4.S - One of the industrial robots designed by a leading...Ch. 4.S - A production line has three machines A, B, and C,...Ch. 4.S - Prob. 8PCh. 4.S - A Web server has five major components that must...Ch. 4.S - Repeat Problem 9 under the condition that one of...Ch. 4.S - Hoping to increase the chances of reaching a...Ch. 4.S - An electronic chess game has a useful life that is...Ch. 4.S - A manufacturer of programmable calculators is...Ch. 4.S - Lucky Lumen light bulbs have an expected life that...Ch. 4.S - Prob. 15PCh. 4.S - Prob. 16PCh. 4.S - A major television manufacturer has determined...Ch. 4.S - Prob. 18PCh. 4.S - Determine the availability for each of these...Ch. 4.S - Prob. 20PCh. 4.S - A manager must decide between two machines. The...Ch. 4.S - Prob. 22PCh. 4.S - Auto batteries have an average life of 2.7 years....Ch. 4 - Prob. 1DRQCh. 4 - Prob. 2DRQCh. 4 - Prob. 3DRQCh. 4 - Prob. 4DRQCh. 4 - Prob. 5DRQCh. 4 - Prob. 6DRQCh. 4 - Prob. 7DRQCh. 4 - Prob. 8DRQCh. 4 - a. What is meant by the term life cycle? b. Why...Ch. 4 - Prob. 10DRQCh. 4 - Prob. 11DRQCh. 4 - Prob. 12DRQCh. 4 - Prob. 13DRQCh. 4 - Explain what quality function development is and...Ch. 4 - Prob. 15DRQCh. 4 - Prob. 16DRQCh. 4 - Prob. 17DRQCh. 4 - Prob. 18DRQCh. 4 - Prob. 19DRQCh. 4 - Describe some of the trade-off that are...Ch. 4 - Prob. 2TSCh. 4 - Prob. 3TSCh. 4 - Prob. 1CTECh. 4 - Prob. 2CTECh. 4 - Prob. 3CTECh. 4 - Prob. 4CTECh. 4 - Prob. 5CTECh. 4 - Give two examples of unethical conduct involving...Ch. 4 - Prob. 1PCh. 4 - Prob. 2PCh. 4 - Prepare a service blueprint for each of these...Ch. 4 - Prepare a service blueprint for each of these post...Ch. 4 - Prob. 5PCh. 4 - Prob. 6PCh. 4 - Prob. 7PCh. 4 - Prepare a table similar to that shown in Problem...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, operations-management and related others by exploring similar questions and additional content below.Similar questions
- Classify the following risks into variation, foreseen uncertainty, unforeseen uncertainty, and chaos:a. A hurricane on the U.S. East Coast floods a regional warehouse destroying alarge amount of stockarrow_forward36. This risk stems from the unavailability of raw materials, IT, skilled labor, facilities, or other resources that threaten the organization's ability and capacity to continue operations. Group of answer choices None of the choices Product or service failure risk Availability risk Business interruption risk Commerce riskarrow_forwardA system consisting of two identical components A& B. (a) Under what conditions does the system fail? (b) Ifthe reliability (i.e. the ability of the system to perform itsintended function satisfactorily) of components A & B are90% and 80%, respectively, under what conditions does thesystem fail?arrow_forward
- Due to the extreme cost of interrupting production, a firm has two standby machines available in case a particular machine breaks down. The machine in use has a reliability of .94, and the backups have reliabilities of .90 and .80. In the event of a failure, either backup can be pressed into service. If one fails, the other backup can be used. Compute the system reliability.arrow_forwardMGT - 314 (Operations Management) MCQ:arrow_forwardDeborah Kellogg buys Breathalyzer test sets for the Denver Police Department. The quality of the test sets from her two suppliers is indicated in the following table: percent defective probability for winter park probability for technology dayton enterprise 1% 0.65 0.25 3% 0.25 0.25 5% 0.10 0.50 For example the probability of getting a batch of tests that are 1% defective from Winter park technology is 0.65. Because Kellogg orders 10,000 tests per order, this would mean there is a 0.65 probability of getting 100 defective tests out of the 10,000 tests if Winter park technology is used to fill the order. A defectice breathalyzer test can be repaired for $0.50. Although the quality of the…arrow_forward
- Q11) In the visual-fit method, the cost analyst visually fits a straight line through a plot. Select one: True Falsearrow_forwardFor each scenario suggest a control that could be used to reduce the risk. Entering negative values for order quantity in a sales order Selling to a customer with an overdue account Ordering from a non-existent supplier Paying for goods that have not been received Entering an alphanumeric customer ID when the business policy is for numeric customer IDs Misappropriation of goods by receiving staff, who also maintain inventory records Ordering too much of a product 8. You are required to list and explain three advantages of computer-executed control activities compared to manually executed control activities.arrow_forwardHow does preventive maintenance differ from predictive maintenance in ensuring system reliability?arrow_forward
- 17- According to a business plan for a startup, the break-even point was calculated at 12,000 units of sales. However, after launch, the average variable cost for the product has gone up. Which of the following is the effect on break-even point? Group of answer choices the effect on break-even point cannot be determined without more information the break-even point will remain the same the break-even point will be higher than 12,000 units the break-even point will be lower than 12,000 units 18- According to a business plan for a startup, the break-even point was calculated at 12,000 units of sales. However, after launch, the unit price for the product had to be lowered. Which of the following is the effect on break-even point? Group of answer choices the break-even point will remain the same the break-even point will be lower than 12,000 units the effect on break-even point cannot be determined without more information the break-even point will be higher than 12,000…arrow_forwardThree (3) computers together provide a replicated service. The manufacturers claim that each computer has a mean time between failure of five days; a failure typically takes four hours to fix. What is the availability of the replicated service?arrow_forward40. Habard's, a chain of hardware stores, sells a variety of tools and home repair items. One of their best wrenches sells for $5.50. Habard's will include a three-year free replacement warranty for an additional $1.50. The wrench is expected to be sub- ject to heavy use and, based on past experience, will fail randomly at a rate of one every eight years. Is it worth purchasing the warranty?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Practical Management ScienceOperations ManagementISBN:9781337406659Author:WINSTON, Wayne L.Publisher:Cengage,
Practical Management Science
Operations Management
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:Cengage,
Process selection and facility layout; Author: Dr. Bharatendra Rai;https://www.youtube.com/watch?v=wjxS79880MM;License: Standard YouTube License, CC-BY