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13.301, "10": 12.78 } }, { "id": "s19", "service_durations": { "1": 13.528, "2": 14.656, "3": 16.396, "4": 12.723, "5": 12.283, "6": 14.144, "7": 11.3, "8": 9.692, "9": 14.63, "10": 12.26 } }, { "id": "s20", "service_durations": { "1": 15.197, "2": 10.998, "3": 13.552, "4": 13.302, "5": 16.121, "6": 14.025, "7": 13.603, "8": 14.144, "9": 12.284, "10": 13.151 } } ], "facility_opening_costs": { "1000": 1133, "1001": 981, "1002": 750, "1003": 1250, "1004": 992, "1005": 896 }, "facility_cost_metadata": { "method": "centrality_scaled", "base_cost": 1000, "heterogeneity": 0.25, "range": [ 750, 1250 ], "centrality_metric": "mean_travel_time_to_customers", "formula": "f_i = base_cost * (1 + heterogeneity * (2*a_i - 1)); a_i = (max_h dbar_h - dbar_i) / (max_h dbar_h - min_h dbar_h); dbar_i = mean_j d_ij over customers j; closer to customers (lower dbar_i) => higher a_i => higher f_i" } }