As described earlier, the component placement sequencing problem can be modeled as a TSP. When modeling the
TSP, the following points have to be taken care of. All the placement positions and the distances must be defined. All
the components picked up, must be placed. Thus the number of pickups should be equal to the number of
placements. The head can pick up either one or two components simultaneously. But not all the components can be
picked by the same nozzle (tool). If the size of the components being placed varies, the nozzles need to be changed.
The time taken for a tool change is normally more than the time for a placement. The objective or the fitness function
will be defined, taking these points into account.