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Down Town Purchase Porterage Services

Abstract

The subject of this project is purchase porterage services. Four objectives are pursued:identify these services from a theoretical perspective and clarify their relationship withproximity concepts, survey practical experiments, analyze physical and informationflows induced by these systems, provide a synthesis of all these elements with thesupport of numerical simulation applied to the cities of Aix-en-Provence and Marseilles.At first, we investigated the expectations and possible forms of purchase porterageservices. This first stage allowed a better understanding of the stakes of these systems interms of proximity and services, both from a theoretical and practical angle.In parallel, we addressed physical and informational flows. A generic software tool wasdeveloped to allow the simulation of purchases and purchase porterage activities.Based on these two prerequisites, an illustrative example of purchase porterage servicewas defined for the city of Aix-en-Provence. Numerical experiments are scheduled soonfor this scenario. The remaining part of the project will be devoted to the definition of asecond scenario, for the city of Marseilles, and to the thorough analysis of the proposedsystems.The experiments conducted on the city of Aix-en-Provence allow us to analyze severalscenarios of installing the PAC system. Two typical days were modeled and analyzed.A busy day (e.g. a sales day) and a market day (the market of Aix-en-Provence being inthe very heart of the city). Several variations of these scenarios were analyzed. Theyfocus mainly on the distribution of the demand (point-relais, parking, home), theschedule of home delivery, delivery times, the platform location, the sizing of thevehicles, etc.These experiments allow us to strengthen and validate the trends expressed during theinvestigations and to identify new key points. In particular, the use of the vehicles isrelatively low. It is then important to mutualize the PAC with another activity in orderto make the system profitable by using remaining vehicles capacities. We have alsoconcluded that the system cannot be established unless a reliable and functional networkof public transportation is available. Thus, the environmental objectives in terms of CO2reduction of such a system will be achieved. If such a system is adopted by users, wecan imagine generalizing it to online sales and then ensure the sustainability of thesystem. Some points have not been addressed in this study, such as the non-availabilityof the customer at home, or the hijack of the system for the use of relay points (baggagerooms) for storage purposes. The use of baggage rooms in the relay points seems to bethe most viable solution, but the fixed costs (rent, maintenance, etc.) of such a systemshould be supported by government initiatives. Home delivery remains fairly viablebecause of the constraints fixed by such a system and competition from online sales.

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