${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{i}s\text{t}\text{h}\text{e}\text{t}\text{e}\text{r}\text{m}\text{u}\text{s}\text{e}\text{d}to\text{r}\text{e}\text{f}\text{e}\text{r}to\text{a}\text{p}\text{r}\text{o}\text{d}\text{u}\text{c}\text{t}\text{i}\text{o}\text{n}\text{t}\text{e}\text{c}\text{h}\text{n}\text{i}\text{q}\text{u}\text{e}in\text{w}\text{h}\text{i}\text{c}\text{h}\text{i}\text{n}\text{v}\text{e}\text{n}\text{t}\text{o}\text{r}\text{y}is\text{k}\text{e}\text{p}\text{t}to\text{a}\text{m}\text{i}\text{n}\text{i}\text{m}\text{u}\text{m}\text{a}\text{n}\text{d}\text{i}\text{n}\text{p}\text{u}\text{t}\text{s}to\text{t}\text{h}\text{e}\text{p}\text{r}\text{o}\text{d}\text{u}\text{c}\text{t}\text{i}\text{o}\text{n}\text{p}\text{r}\text{o}\text{c}\text{e}\text{s}\text{s}\text{a}\text{r}\text{r}\text{i}\text{v}\text{e}\text{e}\text{x}\text{a}\text{c}\text{t}\text{l}\text{y}\text{w}\text{h}\text{e}\text{n}\text{t}\text{h}\text{e}\text{y}\text{a}\text{r}\text{e}\text{n}\text{e}\text{e}\text{d}\text{e}\text{d}\text{.}}$

${?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}is$ the term used $to$ refer $to$ a production technique $in$ which inventory $is$ kept $to$ a minimum and inputs $to$ the production process arrive exactly when they are needed.

Flow production

Just$-in-$time manufacturing

Lean manufacturing

Continuous production