GraspMixin._grasp

mixins.site_solvers.GraspMixin._grasp(
    p,
    objectives,
    weights,
    scorer,
    num_solutions=5,
    show_progress=False,
    threshold_for_coverage=None,
    alpha=0.2,
    random_seed=42,
    max_attempts='default',
    min_sites_different=1,
    local_search_chance=0.8,
    max_swap_count_local_search=10,
    max_value_cutoff=None,
    full_secondary_metrics=False,
    baseline_costs=None,
    meaningful_change_threshold=0.0,
    beyond_thresholds=None,
    unreachable_cost=None,
)

GRASP (Greedy Randomised Adaptive Search Procedure) for finding multiple near-optimal facility location solutions.

Every comparison below runs on scorer.normalise()’d values, where lower is always better – so this is unconditionally a minimisation. The is_minimization flag this replaced could only express a two-way split, and so could not represent a closest_to_target rank_on (an inter-tertile ratio is best at 1.0, with both larger and smaller values worse).