Question

In: Statistics and Probability

Alida Whiting was hired as a reliability engineer for ABC Electronics Inc. The Procurement Department provided...

Alida Whiting was hired as a reliability engineer for ABC Electronics Inc. The Procurement Department

provided details to Alida as to the quality problems they were having with unit #3A from a given

supplier. Alida observed results of quality tests done on the unit showing that 1% of the units were bad

when purchased.

(a) What is the probability that a final assembly containing 10 unit #3A’s has exactly one bad unit

#3A?

Which approach do you think would best assist Alida in reducing final assemblies with one or

more bad unit #3A’s – RCM, RCA, or some other approach? Explain

Solutions

Expert Solution

let the probability of failiure = q = 0.01

probability of success = p =0.99

as the number of units are discrete we will use binomial distribution to find out

probability that a final assembly containing 10 unit #3A’s has exactly one bad unit

#3A

number of #3A used in final assembly = 10

P(x=1) = 10 C 1 (0.99)9 (0.01) = 0.1 x 0.9135 = 0.09135

Alida should use RCM

RCM identifies all of the different ways a piece of equipment or process could fail

RCM is the proactive method which will help alida in reducing final assemblies with one or more bad units by taking preventive measures

RCM asks seven questions that focus on failures that could occur in the future:

  1. What are the functions of the equipment or process?
  2. How can it fail to provide the function?
  3. What causes each functional failure?
  4. What are the effects of each functional failure?
  5. How does each failure impact the goals?
  6. What action should be taken to predict and prevent each failure?
  7. What action should be taken if a proactive task cannot be determined?

orchestra answered 1 year ago
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