${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{a}re\text{v}\text{o}\text{l}\text{u}\text{n}\text{t}\text{a}\text{r}\text{y}\text{g}\text{r}\text{o}\text{u}\text{p}\text{s}of\text{p}\text{e}\text{o}\text{p}\text{l}\text{e}\text{d}\text{r}\text{a}\text{w}\text{n}\text{f}\text{r}\text{o}\text{m}\text{v}\text{a}\text{r}\text{i}\text{o}\text{u}\text{s}\text{p}\text{r}\text{o}\text{d}\text{u}\text{c}\text{t}\text{i}\text{o}\text{n}\text{t}\text{e}\text{a}\text{m}\text{s}\text{w}\text{h}\text{o}\text{m}\text{a}\text{k}\text{e}\text{s}\text{u}\text{g}\text{g}\text{e}\text{s}\text{t}\text{i}\text{o}\text{n}\text{s}\text{a}\text{b}\text{o}\text{u}\text{t}\text{q}\text{u}\text{a}\text{l}\text{i}\text{t}\text{y}\text{b}\text{u}\text{t}\text{h}\text{a}\text{v}\text{e}no\text{a}\text{u}\text{t}\text{h}\text{o}\text{r}\text{i}\text{t}\text{y}to\text{m}\text{a}\text{k}\text{e}\text{d}\text{e}\text{c}\text{i}\text{s}\text{i}\text{o}\text{n}\text{s}or\text{e}\text{x}\text{e}\text{c}\text{u}\text{t}\text{e}\text{.}}$

${?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}$ are voluntary groups $of$ people drawn from various production teams who make suggestions about quality but have $no$ authority $to$ make decisions $or$ execute.

Management teams

Focus groups

Interest groups

Quality control commissions

Quality circles