Class ShipmentModel (1.6.0)

ShipmentModel(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A shipment model contains a set of shipments which must be performed by a set of vehicles, while minimizing the overall cost, which is the sum of:

  • the cost of routing the vehicles (sum of cost per total time, cost per travel time, and fixed cost over all vehicles).
  • the unperformed shipment penalties.
  • the cost of the global duration of the shipments

.. _oneof: https://proto-plus-python.readthedocs.io/en/stable/fields.html#oneofs-mutually-exclusive-fields

Attributes

NameDescription
shipments MutableSequence[google.cloud.optimization_v1.types.Shipment]
Set of shipments which must be performed in the model.
vehicles MutableSequence[google.cloud.optimization_v1.types.Vehicle]
Set of vehicles which can be used to perform visits.
max_active_vehicles int
Constrains the maximum number of active vehicles. A vehicle is active if its route performs at least one shipment. This can be used to limit the number of routes in the case where there are fewer drivers than vehicles and that the fleet of vehicles is heterogeneous. The optimization will then select the best subset of vehicles to use. Must be strictly positive. This field is a member of oneof_ _max_active_vehicles.
global_start_time google.protobuf.timestamp_pb2.Timestamp
Global start and end time of the model: no times outside of this range can be considered valid. The model's time span must be less than a year, i.e. the global_end_time and the global_start_time must be within 31536000 seconds of each other. When using cost_per_*hour fields, you might want to set this window to a smaller interval to increase performance (eg. if you model a single day, you should set the global time limits to that day). If unset, 00:00:00 UTC, January 1, 1970 (i.e. seconds: 0, nanos: 0) is used as default.
global_end_time google.protobuf.timestamp_pb2.Timestamp
If unset, 00:00:00 UTC, January 1, 1971 (i.e. seconds: 31536000, nanos: 0) is used as default.
global_duration_cost_per_hour float
The "global duration" of the overall plan is the difference between the earliest effective start time and the latest effective end time of all vehicles. Users can assign a cost per hour to that quantity to try and optimize for earliest job completion, for example. This cost must be in the same unit as Shipment.penalty_cost.
duration_distance_matrices MutableSequence[google.cloud.optimization_v1.types.ShipmentModel.DurationDistanceMatrix]
Specifies duration and distance matrices used in the model. If this field is empty, Google Maps or geodesic distances will be used instead, depending on the value of the use_geodesic_distances field. If it is not empty, use_geodesic_distances cannot be true and neither duration_distance_matrix_src_tags nor duration_distance_matrix_dst_tags can be empty. Usage examples: - There are two locations: locA and locB. - 1 vehicle starting its route at locA and ending it at locA. - 1 pickup visit request at locB. :: model { vehicles { start_tags: "locA" end_tags: "locA" } shipments { pickups { tags: "locB" } } duration_distance_matrix_src_tags: "locA" duration_distance_matrix_src_tags: "locB" duration_distance_matrix_dst_tags: "locA" duration_distance_matrix_dst_tags: "locB" duration_distance_matrices { rows { # from: locA durations { seconds: 0 } meters: 0 # to: locA durations { seconds: 100 } meters: 1000 # to: locB } rows { # from: locB durations { seconds: 102 } meters: 990 # to: locA durations { seconds: 0 } meters: 0 # to: locB } } } - There are three locations: locA, locB and locC. - 1 vehicle starting its route at locA and ending it at locB, using matrix "fast". - 1 vehicle starting its route at locB and ending it at locB, using matrix "slow". - 1 vehicle starting its route at locB and ending it at locB, using matrix "fast". - 1 pickup visit request at locC. :: model { vehicles { start_tags: "locA" end_tags: "locB" start_tags: "fast" } vehicles { start_tags: "locB" end_tags: "locB" start_tags: "slow" } vehicles { start_tags: "locB" end_tags: "locB" start_tags: "fast" } shipments { pickups { tags: "locC" } } duration_distance_matrix_src_tags: "locA" duration_distance_matrix_src_tags: "locB" duration_distance_matrix_src_tags: "locC" duration_distance_matrix_dst_tags: "locB" duration_distance_matrix_dst_tags: "locC" duration_distance_matrices { vehicle_start_tag: "fast" rows { # from: locA durations { seconds: 1000 } meters: 2000 # to: locB durations { seconds: 600 } meters: 1000 # to: locC } rows { # from: locB durations { seconds: 0 } meters: 0 # to: locB durations { seconds: 700 } meters: 1200 # to: locC } rows { # from: locC durations { seconds: 702 } meters: 1190 # to: locB durations { seconds: 0 } meters: 0 # to: locC } } duration_distance_matrices { vehicle_start_tag: "slow" rows { # from: locA durations { seconds: 1800 } meters: 2001 # to: locB durations { seconds: 900 } meters: 1002 # to: locC } rows { # from: locB durations { seconds: 0 } meters: 0 # to: locB durations { seconds: 1000 } meters: 1202 # to: locC } rows { # from: locC durations { seconds: 1001 } meters: 1195 # to: locB durations { seconds: 0 } meters: 0 # to: locC } } }
duration_distance_matrix_src_tags MutableSequence[str]
Tags defining the sources of the duration and distance matrices; duration_distance_matrices(i).rows(j) defines durations and distances from visits with tag duration_distance_matrix_src_tags(j) to other visits in matrix i. Tags correspond to VisitRequest.tags or Vehicle.start_tags. A given VisitRequest or Vehicle must match exactly one tag in this field. Note that a Vehicle's source, destination and matrix tags may be the same; similarly a VisitRequest's source and destination tags may be the same. All tags must be different and cannot be empty strings. If this field is not empty, then duration_distance_matrices must not be empty.
duration_distance_matrix_dst_tags MutableSequence[str]
Tags defining the destinations of the duration and distance matrices; duration_distance_matrices(i).rows(j).durations(k) (resp. duration_distance_matrices(i).rows(j).meters(k)) defines the duration (resp. the distance) of the travel from visits with tag duration_distance_matrix_src_tags(j) to visits with tag duration_distance_matrix_dst_tags(k) in matrix i. Tags correspond to VisitRequest.tags or Vehicle.start_tags. A given VisitRequest or Vehicle must match exactly one tag in this field. Note that a Vehicle's source, destination and matrix tags may be the same; similarly a VisitRequest's source and destination tags may be the same. All tags must be different and cannot be empty strings. If this field is not empty, then duration_distance_matrices must not be empty.
transition_attributes MutableSequence[google.cloud.optimization_v1.types.TransitionAttributes]
Transition attributes added to the model.
shipment_type_incompatibilities MutableSequence[google.cloud.optimization_v1.types.ShipmentTypeIncompatibility]
Sets of incompatible shipment_types (see ShipmentTypeIncompatibility).
shipment_type_requirements MutableSequence[google.cloud.optimization_v1.types.ShipmentTypeRequirement]
Sets of shipment_type requirements (see ShipmentTypeRequirement).
precedence_rules MutableSequence[google.cloud.optimization_v1.types.ShipmentModel.PrecedenceRule]
Set of precedence rules which must be enforced in the model.
break_rules MutableSequence[google.cloud.optimization_v1.types.ShipmentModel.BreakRule]
Deprecated: No longer used. Set of break rules used in the model. Each vehicle specifies the BreakRule that applies to it via the Vehicle.break_rule_indices field (which must be a singleton).

Classes

BreakRule

BreakRule(mapping=None, *, ignore_unknown_fields=False, **kwargs)

Deprecated: Use top level BreakRule instead. Rules to generate time breaks for a vehicle (e.g. lunch breaks). A break is a contiguous period of time during which the vehicle remains idle at its current position and cannot perform any visit. A break may occur:

  • during the travel between two visits (which includes the time right before or right after a visit, but not in the middle of a visit), in which case it extends the corresponding transit time between the visits
  • before the vehicle start (the vehicle may not start in the middle of a break), in which case it does not affect the vehicle start time.
  • after the vehicle end (ditto, with the vehicle end time).

DurationDistanceMatrix

DurationDistanceMatrix(mapping=None, *, ignore_unknown_fields=False, **kwargs)

Specifies a duration and distance matrix from visit and vehicle start locations to visit and vehicle end locations.

PrecedenceRule

PrecedenceRule(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A precedence rule between two events (each event is the pickup or the delivery of a shipment): the "second" event has to start at least offset_duration after "first" has started.

Several precedences can refer to the same (or related) events, e.g., "pickup of B happens after delivery of A" and "pickup of C happens after pickup of B".

Furthermore, precedences only apply when both shipments are performed and are otherwise ignored.

.. _oneof: https://proto-plus-python.readthedocs.io/en/stable/fields.html#oneofs-mutually-exclusive-fields