Practical Management Science
6th Edition
ISBN: 9781337406659
Author: WINSTON, Wayne L.
Publisher: Cengage,
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A jet engine has 10 components in series. Th e average reliability
of each component is 0.998. What is the reliability of the engine?
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- What is measurement reliability? How do we assess it (give one method) and what can we do to improve reliability?arrow_forwardConsider a product with three components in series, with reliabilities of 0.98, 0.76, and 0.89 for components A, B, and C, respectively. Furthermore, component B uses a backup that also has a reliability of 0.76. What is the reliability of the system? (Round answer to five decimal places.) OA. 0.72916 OB. 0.82196 OC. 0.94240 OD. 0.66287 OE. 0.78908arrow_forwardIf the RDF is equal to 0.2, then the Reliability is Group of answer choices 1 + RDF 1 - RDF b & c 0.2 0.8arrow_forward
- Types of reliability/validity When you use it. How you use it. An example of how to test the reliability/validity. How do you interpret coefficients? Any other information pertinent to understanding reliability or validity.\arrow_forwardAs compared to a system without backup (shown below), 0.99 0.98 0.86 0.99 0.98 0.86 0.99 0.98 0.86 the reliability of the system with backup (shown at the top of the screen) is higher by % (enter your response as a percentage rounded to two decimal places).arrow_forward0.98 0.97 0.86 0.98 0.97 0.86 The reliability of the system shown above = % (enter your response as a percentage rounded to two decimal places).arrow_forward
- Th e following system of components has been proposedfor a new product. Determine the reliability of the system.arrow_forwardAnswer the following questionarrow_forwardPlease answer very carefully and elaborate the answer. 3. When using a test for selection, what is reliability, what is validity, and how are the two related to each other?arrow_forward
- CAN YOU PROVIDE THIS IN EXCEL, I CANT FIGURE OUT HOW TO DO THE EQUATIONS IN EXCEL. One of the industrial robots designed by a leading producer of servomechanisms has four major components. Components’ reliabilities are .98, .95, .94, and .90. All of the components must function in order for the robot to operate effectively.a. Compute the reliability of the robot.b. Designers want to improve the reliability by adding a backup component. Due to space limitations, only one backup can be added. The backup for any component will have the same reliability as the unit for which it is the backup. Which component should get the backup in orderto achieve the highest reliability?c. If one backup with a reliability of .92 can be added to any one of the main components, which component should get it to obtain the highest overall reliability?arrow_forwardSeveral years ago, Baecher, de Neufville, and Paté carried out a study of reported failures of large dams around the world. They concluded that the failure rate was 0.0001 per dam-year. A dam-year is defined as one dam operating for one year. The definitions of "failure" and "large dam" are subject to dispute, but the study has become the basis for much of the reliability studies done by agencies that operate dams. Almost everyone assumes that this failure rate represents a constant failure rate (CFR) scenario even though there is good reason to believe that a bathtub curve, with higher rates of failure at the beginning and end of the life cycle, might be more appropriate. Assuming that the CFR model is accurate, answer the following: a) What is the mean time to failure (MTTF) in dam-years for the Baecher et al. model? b) If an agency manages a portfolio of 350 dams, and they are independent of each other, what is the mean time the agency can expect to carry on before a failure occurs?…arrow_forwardAs compared to a system without backup (shown below), 0.99 0.97 0.87 0.99 0.97 0.87 0.99 0.97 0.87 the reliability of the system with backup (shown at the top of the screen) is higher by % (enter your response as a percentage rounded to two decimal places).arrow_forward
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