The following colors are used for grading runs:
-
Red represents an infeasible design point. The infeasibility can be
caused by violated bounds on parameters other than those shown in the
given graph.
-
Green represents the best design point (based on the calculated objective).
This point is always a feasible point (i.e., no violated constraints).
-
Yellow represents the best design point but a point that is infeasible.
Yellow is used when there is at least one objective defined and either
there are no feasible points found or the best feasible point (colored
green) has a worse calculated objective and penalty. In short, this point
might be a better design even though it is slightly infeasible.
-
Blue represents a Pareto point. When multiple objectives are defined
in the problem formulation, there is no single “best point” but instead
a set of points (called the Pareto set) from which tradeoffs can be made.
For any one of these points, no improvement can be made in one objective
without giving something up in another. A green or yellow point is also
a Pareto point, but it is the one with the best calculated weighted sum
objective and penalty value among all of the Pareto points.
-
Blue/red lines represent lower/upper bounds for parameters that have
these bounds set so that the design points can be visually evaluated
with respect to those bounds.
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