$($e$)$ The Toyota Production System employs all of the following techniques

EXCEPT?

$1.$ Leveling demand $($Heijunka$)$

$2.$ Just$-$in$-$Time $$pull$$ system

$3.$ Employees can stop production lines $($human jidoka$)$

$4.$ Many Tier $1$ suppliers design the parts they supply

$5.$ Kanban

$6.$ Actually, TPS utilizes all of the above