Use this scenario for the following question$($s$).$

The process design team at a manufacturer has broken an assembly process into eight

basic steps, each with a required time, and predecessor as shown in the table. There are

$7\mathrm{.}5$ productive hours available in a day and the manufacturer wishes to produce $400$ units.

Balance the line by assigning tasks to workstations to fill up as much takt time as possible.

Break ties by assigning the longest task first.

Refer to the scenario above. The process design team realizes that the potential spike in

demand for this device requires increased output. They elect to add a seventh worker to

their production team at the first station. What is the net effect of adding this worker?

Nothing$-$the output rate does not change.

The output rate increases by $20\%.$

The output rate increases by $10\%.$

The output rate increases by $5\%.$