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

Quantum efforts

Standby additions

Substitute components

Orthogonal gains

Complementary benefits