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"5": 15.194, "6": 18.707, "7": 13.783, "8": 20.328, "9": 16.37, "10": 15.73 } }, { "id": "s19", "service_durations": { "1": 16.65, "2": 18.038, "3": 20.18, "4": 15.659, "5": 15.118, "6": 17.408, "7": 13.908, "8": 11.929, "9": 18.006, "10": 15.089 } }, { "id": "s20", "service_durations": { "1": 18.704, "2": 13.536, "3": 16.679, "4": 16.372, "5": 19.841, "6": 17.261, "7": 16.743, "8": 17.408, "9": 15.119, "10": 16.186 } } ], "facility_opening_costs": { "1000": 750, "1001": 1077, "1002": 776, "1003": 1250, "1004": 936, "1005": 1071 }, "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" } }