Thesis of Bayrem Tounsi

Contributions in the e-commerce : Integration in the e-fulfillment and delivery services pricing.

All over the world, the growth of e-commerce has led to an increasing importance of the inherent supply chain. This thesis is dedicated to the study of two phases of the e-fulillment process. In the first part, we focus on picking and shipping operations conducted in the warehouse at the e-fulfilment process uphill. We propose a global model based on picking and shipping coordination, and tactical-operational integration. The solution method proposed is based on decomposition of the problem in three phases and it was shown to outperform significantly commercial solver. Then we propose, a second model that is based on a dynamic procedure with rolling horizon that takes into account the uncertainty of the future demand. In the second part of the thesis, we study a last mile delivery system offering two types of service. We address a services pricing problem that takes into account the customers behaviour. Customers are sensitive to the tariff of a delivery service, but also to its quality. We propose a bilevel model where at the upper level, the provider control services tariffs. At the lower level, users react by choosing their delivery service according to a utility function which incorporates the provider tariff and the perceived congestion. We model the customers reaction using a nested logit model and compute the resulting stochastic user equilibrium. Based on a local search that exploits a sensitivity analysis of choice probabilities, a new heuristic algorithm for the bilevel services pricing problem is proposed and compared to others existing approaches.


- Directeurs de thèse : Luce Brotcorne, Yezekael Hayel - Rapporteurs : Yves Crama, Patrick Maillé - Examinateurs : Dominique Feillet, Olivier Peton

Thesis of the team INOCS defended on 19/12/2016