A factory may choose to use $\frac{a_{-}}{\frac{?}{{?}_{-}}}{}_{-}{}_{-}{}_{-}$system if they only want materials to arrive at the facility just as production begins making a unit or batch.

just$-$in$-$time inventory

first$-$in$-$first$-$out

dollar cost averaging

Mass$-$Customization

last$-$in$-$first$-$out