Concept explainers
a)
To determine: Probability of correctly identifying an individual if the three pieces of information each have 75% chance of being correct.
b)
To determine: Probability of correctly identifying an individual if the date of birth is 99% correct, the profession is 50% correct, and the place of birth is 70% correct.
c)
To determine: Probability of correctly identifying an individual if the date of birth is found in two publications, each with a 60% chance of being correct, the profession is from an association
membership with an 80% accuracy, and the place of birth is self-reported on one site with a 50% chance of veracity and confirmed by a tabloid with a 40% reliability.
d)
To determine: Which of the scenarios above has the highest reliability?
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OPERATIONS AND SUPPLY CHAIN MANAGEMENT
- Explain why a product or system might have an overall reliability that is low even though it is com- prised of components that have fairly high reliabilities.arrow_forwardThe semiconductor used in the Sullivan Wrist Calculatorhas five circuits, each of which has its own reliability rate. Component 1 has a reliability of .90; component 2, .95; com-ponent 3, .98; component 4, .90; and component 5, .99. What is the reliability of one semiconductor?arrow_forwardThe two main tactics for improving reliability are _______and______.arrow_forward
- As VP for operations at Mendez-Pifiero Engineering,you must decide which product design, A or B, has the higher reliability.B is designed with backup units for components R3 and R4.What is the reliability of each design?arrow_forwardExplain how someone might decide how reliable is “reliable enough” for a measure. What settings might warrant more stringent criteria for reliability, and why?arrow_forwardDetermine the reliability of the complex system shown if the failure rate of each component is 0.02.arrow_forward
- 0.855 1((1-0.645)x(1-0.800)) = 0.0710 1-0.0710 = 0.929 0.929 0.999 0.855 x 0.929 x 0.999 = 0.7935 Reliability of the system is 0.7935arrow_forward"High reliability can be achieved in a product without having high reliability in the component parts. In fact, any reliability target, no matter how high, can be achieved with only mediocre parts, so long as enough of them are present." Discuss; an example may help.arrow_forwardAs a reliability engineer, your job is to help the plant to achieve its goals. Improvingavailability refers to downtime reduction. This includes managing premature failure(condition monitoring), reducing premature failure (defect elimination), improvedwork management and improved spares management” i. What approaches could be applied during the design phase of an asset toimprove its reliability?arrow_forward
- A 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_forwardA new aircraft control system is being designed thatmust be 98% reliable. This system consists of three components inseries. If all three of the components are to have the same level ofreliability, what level of reliability is required?arrow_forwardWhat is the reliability of the following parallel pro-duction process? R1 5 0.95, R2 5 0.90, R3 5 0.98.arrow_forward
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