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Determine the stationary state probabilities of the system

Question:

Consider a two-unit system with standby redundancy and one mechanic. All repair times of failed units have an Erlang distribution with parameters n = 2 and µ Apart from this, the other model assumptions listed in example 5.5 remain valid.

(1) Describe the behaviour of the system by a Markov chain and draw the transition graph.

(2) Determine the stationary state probabilities of the system.

(3) Sketch the stationary availability of the system as a function of

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