System and method for planning yard crane work

A method for planning yard crane work, comprising:

• determining a target container for work and a container stacking position using a strategy deriving unit;
• and
• stacking a container according to the determined target container for work and the determined container stacking position,
• wherein the strategy deriving unit comprises:
• providing a plurality of work scenarios;
• evolving a first solution group including a plurality of first candidate solutions for determining the target container for work, using a genetic algorithm;
• and
• evolving a second solution group including a plurality of second candidate solutions for determining the container stacking position, using the genetic algorithm,
• wherein each of the first candidate solutions is expressed as a combination of weights assigned to a plurality of evaluation criteria for determining the target container for work,
• wherein each of the second candidate solutions is expressed as a combination of weights assigned to a plurality of evaluation criteria for determining the container stacking position,
• wherein the genetic algorithm comprises:
• selecting the most inferior candidate solution of a target solution group as an inferior candidate solution, the target solution group selected from the first and second solution groups;
• selecting a first parent from the target solution group;
• applying crossover and mutation to the first parent to generate a first child;
• selecting a second parent from the target solution group;
• selecting a second child most similar to the first child from the second parent;
• selecting a more superior child of the first and second children as a superior candidate solution;
• and
• replacing the inferior candidate solution with the superior candidate solution to evolve the target solution group,
• wherein the evolving a first solution group comprises evaluating each of the first candidate solutions based on a second strategy which is the most superior candidate solution of the second solution group,
• wherein the evolving a second solution group comprises evaluating each of the second candidate solutions based on a first strategy which is the most superior candidate solution of the first solution group, and
• wherein evaluating each of the first candidate solutions and each of the second candidate solutions is based on a work scenario arbitrarily selected from the plurality of work scenarios at each evaluation.