${?}_{{?}_{{?}_{?}}{?}_{i}s\text{t}\text{h}\text{e}\text{c}\text{o}\text{l}\text{l}\text{e}\text{c}\text{t}\text{i}\text{o}\text{n}of\text{a}\text{c}\text{t}\text{i}\text{v}\text{i}\text{t}\text{i}\text{e}\text{s}\text{l}\text{e}\text{a}\text{d}\text{i}\text{n}\text{g}upto,\text{b}\text{u}\text{t}\text{n}\text{o}\text{t}\text{i}\text{n}\text{c}\text{l}\text{u}\text{d}\text{i}\text{n}\text{g}\text{,}\text{p}\text{r}\text{o}\text{d}\text{u}\text{c}\text{t}\text{i}\text{o}\text{n}\text{.}}$

The Analysis Process

The Product Realization Process

Product Development

The Detail Design Phase