A manufacturer of disk drives for notebook computers wants an MTBF of at least 45,000 hours. Recent testresults for 10 units were one failure at 10,000 hours, anotherat 25,000 hours, and two more at 45,000 hours. The remainingunits were still running at 50,000 hours. Determine the following:a) Percent of failuresb) Number of failures per unit-hourc) MTBF at this point in the testing

Answered: A manufacturer of disk drives for…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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A manufacturer of disk drives for notebook computers wants a MTBF of at least 50,000 hours. Recent test results for 15 units were one failure at 12,000 hours, one at 20,000 hours, and one more at 48,000 hours. The remaining units were still running at 60,000 hours. Determine the following: a) Percent of failures = % (enter your response as a percentage rounded to one decimal place).
A manufacturer of disk drives for notebook computerswants an MTBF of at least 50,000 hours. Recent test results for10 units were one failure at 10,000 hours, another at 25,000 hours,
15) Given this three-component system and associated reliabilities What is the system reliability? Group of answer choices a) 0.4772 b) 0.0068 c) 0.5228 d) 0.9225 e) 0.9933
4. A soda drink bottling company is interested in winning a contract with a popular drink brand. To win the contract the company must show that it is capable of meeting 6o quality. The contract is for the production of 355mL cans, for which a tolerance of +0.5mL is specified. The company believes the facility is in statistical control and has calculated a global value of R 0.15mL and 355.025mL for its production system. The com- pany ran a capability test by obtaining 10 samples (each of 8 elements) on which capability calculations will be performed. The data obtained is in the following table: Sample R Sample F R 0.18319 354.98938 0.15714 355.02304 B 0.15361 355.01149 G 0.19205 355.06814 0.14892 355.00997 H 0.16240 355.05145 0.19912 355.01490 I 0.19179 355.00207 E 0.18389 355.04694 J 0.11900 355.02327 The parameters A2, D3 and D4 for various n are shown in the following table. A2 2 1.880 3.268 3 1.023 2.574 4 0.729 2.282 5 0.577 2.115 6 0.483 2.004 D3 D3 0.419 1.924 0.076 A2 D4 0. 7.…
A manufacturer of disk drives for notebook computers wants a MTBF of at least 50,000 hours. Recent test results for 15 units were one failure at 12,000 hours, one at 20,000 hours, and one more at 48,000 hours. The remaining units were still running at 60,000 hours. Determine the following: Number of failures per unit-hour of operating time = failures per hour (round your response to eight decimal places).
Classify each of the following as either a Type I error or a Type II error:b. Releasing a guilty person from jail
A manufacturer of household kettles subjected 50 kettles to 10 000 hours of testing. Test results for the 50 kettles show that there were two failures at 3500 hours, two failures at 4800 hours, one failure at 8600 hours, and two more failures at 9000 hours. 4.1.1 Calculate the failure rate percentage (FR %).4.1.2 Calculate the number of failures per unit-hour (FR N).4.1.3 Calculate the MTBF at this point in testing.
Robert Klassan Manufacturing, a medical equipment manufacturer, subjected 90 heart pacemakers to 4,000 hours of testing. Halfway through the testing, 6 pacemakers failed. The failure rate in terms of: Percent of Failure is Confirmed by my Professor to be 6.7% Number of Failures per unit-hour is Confirmed by my Professor to be 0.00001724 failures per hour Can you show me how my professor got these answers? Also what is the Number of Failures per unit year = ? Failures per year (round your response to four decimal places. I know that the answer is Not 3. My professor said the answer wasn't that simple.
What are typical performance testing errors?
Which errors manifest most often during performance testing?
Robert Klassan Manufacturing, a medical equipment manufacturer, subjected 90 heart pacemakers to 4,000 hours of testing. Halfway through the testing, 6 pacemakers failed. The failure in terms of: A.) Percent of Failures =?% (enter your response as a percentage rounded to one decimal place) B.) Number of Failures per unit-hour= ? Failures per hour (round your response to eight decimal places). C.) Number of Failures per unit-hear= ? Failures per year (round your response to four decimal places) D.) If 1,100 people receive pacemaker implants, how many units can we expect to fail during the following year? Number of Failures= ? failures (round your response to two decimal places). This was an example problem given to me. I have a test with a similar question in April. Any explanation would be greatly appreciated.
Fearless Inc. has designed and tested 400 Super Sucker Vacuum Cleaner models. All of them were operated for 1,000 hours at Lubbock's Fearless test facility. Out of all the vacuums 2 of them failed during the test. One of them after 900 hours and the other after 500 hours. What is this product estimated Mean Time Between Failures?

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