Question: A certain type component has two states: 0=OFF and 1=OPERATING. In state 0, the process remains there a random length of time, which is

A certain type component has two states: 0=OFF and 1=OPERATING. In state

A certain type component has two states: 0=OFF and 1=OPERATING. In state 0, the process remains there a random length of time, which is exponentially distributed with parameter a, and then moves to state 1. The times in state 1 is exponentially distributed with parameter 3, after which the process returns to 0. The system has two of these components, A and B, with distinct parameters: Component Operating Failure Rate Repair Rate BA BB A In order for the system to operate, at least one of components A and B must be operating (a parallel system). Assume that the component stochastic processes are independent of one another. Determine the long run probability that the system is operating by (a) Considering each component separately as a two-state Markov chain and using their statistical independence; (b) Considering the system as a four-state Markov chain and solving the equation TQ = 0.

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