The horizontal lines represent the 13 parallel production lines. Each box within a line represents a particular cable. Time runs from left to right and the left edge of each box is when work on that cable is started, and the right edge is when work on that cable finishes. Cables are not lined up along the left side because most cables have release times that occur after the start of the scheduling window. The color of each box is an indication of how well that cable is handled in this solution, relative to some lower bound for each cable.
Dark green is best, red is worst.
The large red boxes indicate cables that cause infeasible setups, and solutions with such boxes in them are not implementable. The general color of this solution is greener then the first one, reflecting better setup costs and fewer late cables. This solution is within 2.5 percent of the best solution ever produced for this problem. The last figure shows the movement of 3 cables through the squeaky wheel priority queue over consecutive iterations of the solver. As the solver produces successive solutions it learns which of the cables are actually harder than others.