CONWIP is a good management solution for a line with high product mix, variable routing times and different routing paths. As an implementation condition, the production have to follow a consistent and stable process, which is usually the case (for example cutting – machining – heat treatment – quality control). All references moving along all workcenters isn’t a requirement. Some of the routing may skip operations. It is also possible to design a routing in which the references moves several times along the same workcenter: in that case there will be several columns for this workcenter on the CONWIP control panel.