{ "scenario": "cold_chain", "summary": { "scenario": "cold_chain", "horizon_min": 480, "docks": 6, "yard_slots": 15, "inbound_trucks": 6, "outbound_trucks": 6, "cross_dock_candidates": 2, "staging_capacity": 54 }, "schedule": { "algorithm": "cp_sat", "objective": "minimize_turnaround", "assignments": [ { "truck_id": "IN-001", "dock_id": "D06", "yard_slot_id": "Y11", "start_min": 35, "end_min": 82, "setup_start_min": 24, "is_cross_dock": false, "staging_location": "STG-001" }, { "truck_id": "IN-004", "dock_id": "D04", "yard_slot_id": "Y11", "start_min": 72, "end_min": 126, "setup_start_min": 62, "is_cross_dock": false, "staging_location": "STG-004" }, { "truck_id": "IN-005", "dock_id": "D05", "yard_slot_id": "Y06", "start_min": 91, "end_min": 157, "setup_start_min": 80, "is_cross_dock": false, "staging_location": "STG-005" }, { "truck_id": "IN-003", "dock_id": "D03", "yard_slot_id": "Y15", "start_min": 122, "end_min": 170, "setup_start_min": 116, "is_cross_dock": true, "staging_location": null }, { "truck_id": "IN-006", "dock_id": "D06", "yard_slot_id": "Y03", "start_min": 141, "end_min": 171, "setup_start_min": 130, "is_cross_dock": false, "staging_location": "STG-006" }, { "truck_id": "IN-002", "dock_id": "D01", "yard_slot_id": "Y09", "start_min": 155, "end_min": 225, "setup_start_min": 147, "is_cross_dock": true, "staging_location": null }, { "truck_id": "OUT-006", "dock_id": "D02", "yard_slot_id": "Y15", "start_min": 190, "end_min": 215, "setup_start_min": 181, "is_cross_dock": false, "staging_location": "STG-006" }, { "truck_id": "OUT-001", "dock_id": "D02", "yard_slot_id": "Y09", "start_min": 249, "end_min": 285, "setup_start_min": 239, "is_cross_dock": false, "staging_location": "STG-001" }, { "truck_id": "OUT-005", "dock_id": "D03", "yard_slot_id": "Y04", "start_min": 277, "end_min": 328, "setup_start_min": 273, "is_cross_dock": false, "staging_location": "STG-005" }, { "truck_id": "OUT-004", "dock_id": "D06", "yard_slot_id": "Y10", "start_min": 289, "end_min": 321, "setup_start_min": 283, "is_cross_dock": false, "staging_location": "STG-004" }, { "truck_id": "OUT-003", "dock_id": "D01", "yard_slot_id": "Y02", "start_min": 314, "end_min": 350, "setup_start_min": 304, "is_cross_dock": false, "staging_location": "STG-003" }, { "truck_id": "OUT-002", "dock_id": "D06", "yard_slot_id": "Y03", "start_min": 342, "end_min": 383, "setup_start_min": 336, "is_cross_dock": false, "staging_location": "STG-002" } ], "cross_dock_transfers": [ { "transfer_id": "XD-IN-003", "inbound_truck_id": "IN-003", "outbound_truck_id": "OUT-003", "shipment_id": "SHP-IN-003-0", "start_min": 170, "duration_min": 15, "path": [ "D03", "SORT", "OUT-003" ] }, { "transfer_id": "XD-IN-002", "inbound_truck_id": "IN-002", "outbound_truck_id": "OUT-006", "shipment_id": "SHP-IN-002-0", "start_min": 225, "duration_min": 15, "path": [ "D01", "SORT", "OUT-006" ] } ], "metrics": { "makespan_min": 383, "avg_turnaround_min": 53.2, "max_turnaround_min": 78, "dock_utilization_pct": 22.2, "yard_peak_occupancy": 4, "missed_departures": 0, "cross_dock_count": 2, "staging_usage_pct": 18.5, "throughput_trucks": 12, "reschedule_count": 0, "tardiness_total_min": 0 }, "solve_time_sec": 0.017, "status": "optimal", "dock_timeline": [ { "truck_id": "IN-002", "dock_id": "D01", "dock_zone": "cold", "direction": "inbound", "truck_type": "tanker", "setup_start": 147, "start": 155, "end": 225, "duration": 70, "setup_duration": 8, "is_cross_dock": true, "cargo_type": "frozen", "priority": 1 }, { "truck_id": "OUT-003", "dock_id": "D01", "dock_zone": "cold", "direction": "outbound", "truck_type": "box_truck", "setup_start": 304, "start": 314, "end": 350, "duration": 36, "setup_duration": 10, "is_cross_dock": false, "cargo_type": "general", "priority": 5 }, { "truck_id": "OUT-006", "dock_id": "D02", "dock_zone": "frozen", "direction": "outbound", "truck_type": "reefer", "setup_start": 181, "start": 190, "end": 215, "duration": 25, "setup_duration": 9, "is_cross_dock": false, "cargo_type": "general", "priority": 1 }, { "truck_id": "OUT-001", "dock_id": "D02", "dock_zone": "frozen", "direction": "outbound", "truck_type": "box_truck", "setup_start": 239, "start": 249, "end": 285, "duration": 36, "setup_duration": 10, "is_cross_dock": false, "cargo_type": "high_value", "priority": 1 }, { "truck_id": "IN-003", "dock_id": "D03", "dock_zone": "cold", "direction": "inbound", "truck_type": "box_truck", "setup_start": 116, "start": 122, "end": 170, "duration": 48, "setup_duration": 6, "is_cross_dock": true, "cargo_type": "frozen", "priority": 5 }, { "truck_id": "OUT-005", "dock_id": "D03", "dock_zone": "cold", "direction": "outbound", "truck_type": "tanker", "setup_start": 273, "start": 277, "end": 328, "duration": 51, "setup_duration": 4, "is_cross_dock": false, "cargo_type": "general", "priority": 3 }, { "truck_id": "IN-004", "dock_id": "D04", "dock_zone": "frozen", "direction": "inbound", "truck_type": "reefer", "setup_start": 62, "start": 72, "end": 126, "duration": 54, "setup_duration": 10, "is_cross_dock": false, "cargo_type": "high_value", "priority": 4 }, { "truck_id": "IN-005", "dock_id": "D05", "dock_zone": "cold", "direction": "inbound", "truck_type": "reefer", "setup_start": 80, "start": 91, "end": 157, "duration": 66, "setup_duration": 11, "is_cross_dock": false, "cargo_type": "high_value", "priority": 5 }, { "truck_id": "IN-001", "dock_id": "D06", "dock_zone": "frozen", "direction": "inbound", "truck_type": "dry_van", "setup_start": 24, "start": 35, "end": 82, "duration": 47, "setup_duration": 11, "is_cross_dock": false, "cargo_type": "hazmat", "priority": 1 }, { "truck_id": "IN-006", "dock_id": "D06", "dock_zone": "frozen", "direction": "inbound", "truck_type": "reefer", "setup_start": 130, "start": 141, "end": 171, "duration": 30, "setup_duration": 11, "is_cross_dock": false, "cargo_type": "perishable", "priority": 5 }, { "truck_id": "OUT-004", "dock_id": "D06", "dock_zone": "frozen", "direction": 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