Pick one of the four graph models as a starting point. You should select the least complex model that provides only notions you'll need, and no extraneous ones. Rename the sets and relations so that they are appropriate to this problem. For those that can, elaborate the model accordingly. You need not redraw your model, but you should label the addition with the number of the constraint.
Every machine is on at least one link.
There is at most one link between a given pair of machines. The bandwidth of a link does not change over time. Diagramming Tool Suppose you are designing a new diagramming tool, and you want to model the kinds of diagram that are to be produced. Diagrams are constructed from components, namely boxes and arrows, which can optionally be labelled. An arrow must be connected to a box at each end, and can be labelled in the middle and at each end.