Résumé

Efficient inventory management (IM) presents an
important key driver for supply chain (SC) sustainability.
This latter becomes a crucial concern for decision-makers and
managers in all domains, particularly in the matter of sensitive
areas that affect human well-being, namely the pharmaceutical
industry. Medicines IM for a sustainable Pharmaceutical Sup-
ply Chain (PSC) brought further particularities compared to
the traditional SCs. Besides the economic preoccupation, social
and environmental issues might be considered. In this work, we
assess the impact of the Lateral Transshipment (LT) strategy on
the sustainability of the IM process. We compare the total costs
of two cases, IM with and without LT strategy. We propose an
IM model that seeks the optimal replenishment order quantity
of multiple types of products and the shipment time in a
two-echelon PSC under a centralized setting. The considered
PSC consists of a pharmaceutical company (PC), a Pharma-
distributor (PD), and multiple hospitals. The mathematical
model takes into account the transportation costs including LT
costs -in the case when LT is included- as well as shortage,
and products with high deterioration rate costs. We attempt
to minimize unused medicines leftover by minimizing the
deterioration rate of products at both distributor and hospital
sites.