PhD Position F/M Integration of forecasting methods into the optimization models: an application to city logistics
il y a 4 semaines
Contexte et atouts du poste
A central issue in city logistics is to design systems that move goods to, from, and within
urban areas while meeting sustainability goals. Such city logistics systems are generally based
on new business models, cooperation among stakeholders, resource sharing, consolidation,
synchronization of operations, multi and intermodality. Here, we consider an orchestrator
that manages a system involving freight transporters which can be carriers or logistics service
providers. One of the critical activities of the orchestrator in coordinating and managing
the resources offered by the freight transporters is to distribute the transportation demand
among them. However, this task is complicated by the fact that transportation demand is
uncertain.
To help the orchestrator in his decision process, we address the associated planning problem:
the Allocation Resource Problem in city logistics with Demand Uncertainty (ARPDU). The
ARPDU is an operational problem that typically has to be solved the day before the resources
are deployed. Given the solution of the ARPDU, the orchestrator can inform the freight
providers. They can then plan their activities for the next day by including the requests of
the orchestrator in the set of the other logistics tasks they have to perform.
The ARPDU aims to determine what logistics facilities should be used and when and where
the vehicles of the carriers should be assigned to cover the demand over the planning period
in the most efficient way. More precisely, the ARPDU aims to select the facilities (crossdock
platform, storage area, parking spaces...) to be used, the types and the numbers of
vehicles (vans, cargo-bicycles,...), to determine what are their starting points and during
which periods they are used. Additional operational constraints can be considered according
to the products delivered and to the logistics means.
A key feature of the ARPDU is that demand and its characteristics (quantity, origin, destination,
time slots when the freight becomes available or may be delivered) is uncertain, i.e.,
unknown or partially known. In practice, the orchestrator must estimate the demand on the
urban area for the considered time horizon using historical data. This demand forecast is
based on a model of the urban territory that must be built first.
This thesis is performed in the context of the ANR project Adele.
Principales activités
This thesis is part of the general field of decisions-focused predictions. It will address the
scientific challenge related to the integration of forecasting methods into the optimization
models and solution methods. This implies determining useful information in available
data, developing some ad-hoc forecasting methods, managing their integration into decision
models, and developing innovative optimization algorithms in which the selection of the best
demand estimators is part of the decision process.
The main steps of the thesis will be:
. Demand modeling and design of forecasting methods;
. Mathematical modeling;
. Development (design and implementation) of innovative ad-hoc optimization algorithms
based on mathematical modeling;
Compétences
Technical skills and level required :
Good knowledge in combinatorial opimization, Stochastic optimization, machine learning
Coding: C++, Java
Avantages
Subsidized meals Partial reimbursement of public transport costs Leave: 7 weeks of annual leave + 10 extra days off due to RTT (statutory reduction in working hours) + possibility of exceptional leave (sick children, moving home, etc.) Possibility of teleworking and flexible organization of working hours Professional equipment available (videoconferencing, loan of computer equipment, etc.) Social, cultural and sports events and activities Access to vocational training Social security coverage-
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