I ran the optimization for 5 services, 3 of which required a specific skill. One of the available vehicles had the required skill; two of these services were assigned, while one was not, and the error message stated: ‘cannot serve required skill.’
Can you provide a reason for this? I would expect all three orders requiring the skill to be assigned to the same vehicle.
{
"configuration": {
"routing": {
"calc_points": true,
"return_snapped_waypoints": true
}
},
"objectives": [
{
"type": "min",
"value": "completion_time"
}
],
"vehicles": [
{
"vehicle_id": "AUT004",
"type_id": "small_truck",
"start_address": {
"location_id": "sede_nuova_cogea",
"lon": 7.7150116,
"lat": 44.9719126
},
"return_to_depot": true,
"skills": [],
"shifts": [
{
"shift_id": "05:00_16:00",
"start_address": {
"location_id": "sede_nuova_cogea",
"lon": 7.7150116,
"lat": 44.9719126
},
"earliest_start": 1725937200,
"latest_end": 1725976800
}
],
"break": {
"earliest": 1725958800,
"latest": 1725962400,
"duration": 3600
},
"earliest_start": 1725937200,
"latest_end": 1725976800,
"max_driving_time": 18000
},
{
"vehicle_id": "AUT003",
"type_id": "small_truck",
"start_address": {
"location_id": "sede_nuova_cogea",
"lon": 7.7150116,
"lat": 44.9719126
},
"return_to_depot": true,
"skills": [],
"shifts": [
{
"shift_id": "09:00_18:00",
"start_address": {
"location_id": "sede_nuova_cogea",
"lon": 7.7150116,
"lat": 44.9719126
},
"earliest_start": 1725951600,
"latest_end": 1725984000
}
],
"break": {
"earliest": 1725966000,
"latest": 1725969600,
"duration": 3600
},
"earliest_start": 1725951600,
"latest_end": 1725984000,
"max_driving_time": 28800
},
{
"vehicle_id": "AUT002",
"type_id": "small_truck",
"start_address": {
"location_id": "sede_nuova_cogea",
"lon": 7.7150116,
"lat": 44.9719126
},
"return_to_depot": true,
"skills": [
"PERMISSION_001"
],
"shifts": [
{
"shift_id": "05:00_14:00",
"start_address": {
"location_id": "sede_nuova_cogea",
"lon": 7.7150116,
"lat": 44.9719126
},
"earliest_start": 1725937200,
"latest_end": 1725969600
}
],
"break": {
"earliest": 1725955200,
"latest": 1725958800,
"duration": 3600
},
"earliest_start": 1725937200,
"latest_end": 1725969600,
"max_driving_time": 3600
}
],
"vehicle_types": [
{
"type_id": "small_truck",
"profile": "small_truck",
"capacity": [
7000,
7000
]
}
],
"services": [
{
"id": "929$17",
"name": "Via Carlo Alberto, 42\r\rTORINO\rITALY",
"duration": 300,
"address": {
"location_id": "Via Carlo Alberto, 42\r\rTORINO\rITALY",
"street_hint": "Via Carlo Alberto, 42\r\rTORINO\rITALY",
"lon": 7.6819519,
"lat": 45.0624859
},
"type": "delivery",
"size": [
300,
300
],
"required_skills": [
"PERMISSION_001"
],
"time_windows": [
{
"earliest": 1725955200,
"latest": 1725966000
}
]
},
{
"id": "930$17",
"name": "Via Resegone, 25\r\r20084 RIVOLI\rITALY",
"duration": 300,
"address": {
"location_id": "Via Resegone, 25\r\r20084 RIVOLI\rITALY",
"street_hint": "Via Resegone, 25\r\r20084 RIVOLI\rITALY",
"lon": 9.1553843,
"lat": 45.3954587
},
"type": "delivery",
"required_skills": [
"PERMISSION_001"
],
"time_windows": [
{
"earliest": 1725919200,
"latest": 1726005540
}
]
},
{
"id": "931$17",
"name": "Via Madama Cristina, 53\r\rTORINO\rITALY",
"duration": 300,
"address": {
"location_id": "Via Madama Cristina, 53\r\rTORINO\rITALY",
"street_hint": "Via Madama Cristina, 53\r\rTORINO\rITALY",
"lon": 7.679192,
"lat": 45.0524391
},
"type": "delivery",
"size": [
300,
300
],
"required_skills": [
"PERMISSION_001"
],
"time_windows": [
{
"earliest": 1725951600,
"latest": 1725984000
}
]
},
{
"id": "42$33",
"name": "Destinazione 1",
"address": {
"location_id": "Destinazione 1",
"street_hint": "Destinazione 1",
"lon": 7.6271546,
"lat": 45.0972003
},
"type": "service"
},
{
"id": "7$1250000001",
"name": "Via XX Settembre, 79\r\r10128 TORINO\rITALY",
"duration": 300,
"address": {
"location_id": "Via XX Settembre, 79\r\r10128 TORINO\rITALY",
"street_hint": "Via XX Settembre, 79\r\r10128 TORINO\rITALY",
"lon": 7.68146668754212,
"lat": 45.06869854999999
},
"type": "delivery",
"size": [
0,
0
]
}
]
}
… The reasons we return are also based on a heuristic and are not guaranteed to be “correct”. Maybe we should return more than one reason in case more than one is likely.