In Example $2\mathrm{.}7,$ suppose an operator is assigned three machines, the work shift begins

at $8$:$00$ A$.$M$.,$ a $15-$minute break occurs at $9$:$45$ A$.$M$.,$ a $30-$minute lunch break occurs at

$11$:$45$ A$.$M$.,$ a $15-$minute break occurs at $2$:$00$ P$.$M$.,$ and the shift ends at $4$:$00$ P$.$M$.$ When

breaks occur, all machines are stopped. Parts cannot be partially machined when machines

are stopped. Hence, transient conditions exist when machines are started and

when machines are stopped. How many parts are produced per shift? Under steadystate

conditions, how many parts would be produced during an eight$-$hour period?