Question: A service process has three stages. The error percentages are: 8% at stage one, 7% at stage two, and 9% at stage three. The connection

A service process has three stages. The error percentages are: 8% at stage one, 7% at stage two, and 9% at stage three. The connection logic of the three stages is that a good overall outcome happens only when all stages individually have good outcomes.

(a)[4] Draw the event tree for this situation with all necessary details.

(b)[10] Find the probabilities of defective and good overall outcomes (6 decimals).

(c)[2] Calculate and interpret the EPMO of this process (1 decimal).

(d)[4] Calculate the sigma level of the process (2 decimals) and state it. Sketch the sigma level.

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