The batches must be routed through five operations to complete the processing

of the parts. Average batch quantity $=100$ units, average setup time $=3\mathrm{.}0$ hr per batch,

number of operations per batch are $5$ and average operation time is $8$ min per piece

for the population of parts made in the plant. Nonoperation time is $7\mathrm{.}5$ hr$.$ The plant

has $20$ production machines that are $100\%$ utilized $($setup and run time$),$ and the

machine operates $45$ hr$/$wk$.$ Determine:

$($a$)$ Weekly plant production rate

$($b$)$ Work$-$in$-$process for the plant.

$3\mathrm{.}4$ How would you define the term manufacturing lead time?