What batch size minimizes WIP without decreasing capacity? Assume all three steps use the same batch size, and that the transfer batch size between steps $1$ and $2,$ and between steps $2$ and $3$ equals the production batch size $($i$.$e$.,$ the units in a production batch must be moved together between steps.$).$

What batch size minimizes WIP without decreasing capacity? Assume all three steps use the same batch size, and that the transfer batch size between steps $1$ and $2,$ and between steps $2$ and $3$ equals the production batch size $($i$.$e$.,$ the units in a production batch must be moved together between steps.$).$

$10$ units

$17$ units

$30$ units

$100$ units

none of the above