The first introducer of value stream mapping (VSM) in (Rother and Shock, 1998) point out
that it is important to understand clearly that we need to focus on one product family. They
state that, “Drawing all your product flows on one map is too complicated” (Rother and
Shock, 1998 P6). To apply VSM to any organisation we need to select the product or product
families, which sell most to draw the current and future state map for.