Refer to the previous problem.
a. Assume that the single switch used in plan 1 is 98 percent reliable, while reliabilities of the
machines remain the same. Recalculate the reliability of plan 1.
Compare the reliability of this
plan with the reliability of plan 1 calculated in solving the original problem.
How much did the
reliability of plan 1 decrease as a result of a 98 percent reliable switch?
b. Assume that the three switches used in plan 2 are all 98 percent reliable, while reliabilities of
the machines remain the same
. Recalculate the reliability of plan 2. Compare the reliability of
this plan with the reliability of plan 2 calculated in solving the original problem. How much
did the reliability of plan 2 decrease?
