{
  "metadata": {
    "title": "Small Easy Instance (1 DP, 2 DS, 8 PL)",
    "name": "instance_small_easy_8pl",
    "description": "Introductory easy instance with abundant vehicle availability, large capacities, and full-day time windows. Ideal for testing greedy heuristics.",
    "counts": {
      "num_dp": 1,
      "num_ds": 2,
      "num_pl": 8,
      "total_nodes": 11
    },
    "total_nodes": 11,
    "delivery_points_count": 8,
    "total_delivery_demand": 84,
    "total_pickup_demand": 14
  },
  "nodes": [
    {
      "id": "DP_1",
      "type": "DP",
      "name": "Main Central Warehouse",
      "x": 10.0,
      "y": 50.0,
      "demand": 0,
      "pickup": 0,
      "tw_open": 360,
      "tw_close": 1200,
      "service_time": 30
    },
    {
      "id": "DS_1",
      "type": "DS",
      "name": "Northern Secondary Hub",
      "x": 45.0,
      "y": 80.0,
      "demand": 0,
      "pickup": 0,
      "tw_open": 420,
      "tw_close": 1140,
      "service_time": 25
    },
    {
      "id": "DS_2",
      "type": "DS",
      "name": "Southern Secondary Hub",
      "x": 45.0,
      "y": 20.0,
      "demand": 0,
      "pickup": 0,
      "tw_open": 420,
      "tw_close": 1140,
      "service_time": 25
    },
    {
      "id": "PL_1",
      "type": "PL",
      "name": "Customer North Alpha",
      "x": 40.0,
      "y": 86.0,
      "demand": 10,
      "pickup": 0,
      "tw_open": 420,
      "tw_close": 1140,
      "service_time": 10
    },
    {
      "id": "PL_2",
      "type": "PL",
      "name": "Customer North Beta",
      "x": 50.0,
      "y": 86.0,
      "demand": 12,
      "pickup": 4,
      "tw_open": 420,
      "tw_close": 1140,
      "service_time": 10
    },
    {
      "id": "PL_3",
      "type": "PL",
      "name": "Customer North Gamma",
      "x": 41.0,
      "y": 74.0,
      "demand": 8,
      "pickup": 0,
      "tw_open": 420,
      "tw_close": 1140,
      "service_time": 10
    },
    {
      "id": "PL_4",
      "type": "PL",
      "name": "Customer North Delta",
      "x": 49.0,
      "y": 74.0,
      "demand": 14,
      "pickup": 2,
      "tw_open": 420,
      "tw_close": 1140,
      "service_time": 10
    },
    {
      "id": "PL_5",
      "type": "PL",
      "name": "Customer South Alpha",
      "x": 40.0,
      "y": 26.0,
      "demand": 9,
      "pickup": 0,
      "tw_open": 420,
      "tw_close": 1140,
      "service_time": 10
    },
    {
      "id": "PL_6",
      "type": "PL",
      "name": "Customer South Beta",
      "x": 50.0,
      "y": 26.0,
      "demand": 11,
      "pickup": 3,
      "tw_open": 420,
      "tw_close": 1140,
      "service_time": 10
    },
    {
      "id": "PL_7",
      "type": "PL",
      "name": "Customer South Gamma",
      "x": 41.0,
      "y": 14.0,
      "demand": 13,
      "pickup": 0,
      "tw_open": 420,
      "tw_close": 1140,
      "service_time": 10
    },
    {
      "id": "PL_8",
      "type": "PL",
      "name": "Customer South Delta",
      "x": 49.0,
      "y": 14.0,
      "demand": 7,
      "pickup": 5,
      "tw_open": 420,
      "tw_close": 1140,
      "service_time": 10
    }
  ],
  "fleet": {
    "echelon_1": {
      "type": "Heavy Truck (DP -> DS)",
      "capacity": 350,
      "fixed_cost": 280.0,
      "cost_per_km": 1.75,
      "max_duration": 600,
      "fixed_cost_cents": 28000,
      "cost_per_km_cents": 175
    },
    "echelon_2": {
      "type": "Delivery Van (DS -> PL)",
      "capacity": 65,
      "fixed_cost": 85.0,
      "cost_per_km": 0.8,
      "max_duration": 480,
      "fixed_cost_cents": 8500,
      "cost_per_km_cents": 80
    }
  },
  "duration_matrix_min": {
    "DP_1": {
      "DP_1": 0,
      "DS_1": 61,
      "DS_2": 61,
      "PL_1": 62,
      "PL_2": 72,
      "PL_3": 52,
      "PL_4": 61,
      "PL_5": 51,
      "PL_6": 62,
      "PL_7": 63,
      "PL_8": 71
    },
    "DS_1": {
      "DP_1": 61,
      "DS_1": 0,
      "DS_2": 80,
      "PL_1": 10,
      "PL_2": 10,
      "PL_3": 10,
      "PL_4": 10,
      "PL_5": 72,
      "PL_6": 72,
      "PL_7": 88,
      "PL_8": 88
    },
    "DS_2": {
      "DP_1": 61,
      "DS_1": 80,
      "DS_2": 0,
      "PL_1": 88,
      "PL_2": 88,
      "PL_3": 72,
      "PL_4": 72,
      "PL_5": 10,
      "PL_6": 10,
      "PL_7": 10,
      "PL_8": 10
    },
    "PL_1": {
      "DP_1": 62,
      "DS_1": 10,
      "DS_2": 88,
      "PL_1": 0,
      "PL_2": 13,
      "PL_3": 16,
      "PL_4": 20,
      "PL_5": 80,
      "PL_6": 81,
      "PL_7": 96,
      "PL_8": 97
    },
    "PL_2": {
      "DP_1": 72,
      "DS_1": 10,
      "DS_2": 88,
      "PL_1": 13,
      "PL_2": 0,
      "PL_3": 20,
      "PL_4": 16,
      "PL_5": 81,
      "PL_6": 80,
      "PL_7": 97,
      "PL_8": 96
    },
    "PL_3": {
      "DP_1": 52,
      "DS_1": 10,
      "DS_2": 72,
      "PL_1": 16,
      "PL_2": 20,
      "PL_3": 0,
      "PL_4": 11,
      "PL_5": 64,
      "PL_6": 65,
      "PL_7": 80,
      "PL_8": 81
    },
    "PL_4": {
      "DP_1": 61,
      "DS_1": 10,
      "DS_2": 72,
      "PL_1": 20,
      "PL_2": 16,
      "PL_3": 11,
      "PL_4": 0,
      "PL_5": 65,
      "PL_6": 64,
      "PL_7": 81,
      "PL_8": 80
    },
    "PL_5": {
      "DP_1": 51,
      "DS_1": 72,
      "DS_2": 10,
      "PL_1": 80,
      "PL_2": 81,
      "PL_3": 64,
      "PL_4": 65,
      "PL_5": 0,
      "PL_6": 13,
      "PL_7": 16,
      "PL_8": 20
    },
    "PL_6": {
      "DP_1": 62,
      "DS_1": 72,
      "DS_2": 10,
      "PL_1": 81,
      "PL_2": 80,
      "PL_3": 65,
      "PL_4": 64,
      "PL_5": 13,
      "PL_6": 0,
      "PL_7": 20,
      "PL_8": 16
    },
    "PL_7": {
      "DP_1": 63,
      "DS_1": 88,
      "DS_2": 10,
      "PL_1": 96,
      "PL_2": 97,
      "PL_3": 80,
      "PL_4": 81,
      "PL_5": 16,
      "PL_6": 20,
      "PL_7": 0,
      "PL_8": 11
    },
    "PL_8": {
      "DP_1": 71,
      "DS_1": 88,
      "DS_2": 10,
      "PL_1": 97,
      "PL_2": 96,
      "PL_3": 81,
      "PL_4": 80,
      "PL_5": 20,
      "PL_6": 16,
      "PL_7": 11,
      "PL_8": 0
    }
  }
}