Define reliability

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Control Concepts and Methods

Discussion Question 1: Provide 1 example of an open-loop system and 1 example of a closed-loop system.

Discussion Question 2: Given an unstable pattern of variation, describe the relationship of control limits, Type 1 errors, and Type 2 errors.

Discussion Question 3: Given the following: n = 10 samples, = 0.30 inches and the process range of = 0.0025 inches. What are the control limits of the - chart and - chart?

Design for Reliability

Discussion Question 1: From a design perspective, define reliability, and describe its major characteristics.

Discussion Question 2: A system consists of four subsystems connected in series. Determine the overall system reliability. Each subsystem has the following reliabilities:

  • Subsystem A= 0.95
  • Subsystem B = 0.80
  • Subsystem C = 0.85
  • Subsystem D = 0.90

Discussion Question 3: Assume that a system has operational redundancy with three subsystems connected in parallel. Determine the overall system reliability. Each subsystem has the following reliabilities:

  • Subsystem A = 0.95
  • Subsystem B = 0.80
  • Subsystem C = 0.90

Discussion Question 4: A system has five subsystems with the following Mean-Time Between Failures (MTBF). The five systems are connected in series. Determine the probability of survival for an operating period of 500 hours:

  • MTBF of Subsystem A= 5,270 hours
  • MTBF of Subsystem B = 8,110 hours
  • MTBF of Subsystem C = 4,750 hours
  • MTBF of Subsystem D = 6,050 hours
  • MTBF of Subsystem E = 1,800 hours

Reference no: EM132457636

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