A Joint Economic Lot Size Model for a Single-manufacturer, Multiple Retailers, and Multi-product with Electric Trucks and Drone

This study investigates the effect of electric trucks and drones on single-manufacturer, multi-retailer, and multi-product. This study aims to propose a mathematical model that minimizes the total cost of the supply chain. The emissions come from the production process, and inventory carried out by the manufacturer and retailers. The lead times depend on production, transportation, courier, charging, loading-unloading, and in-transit activities. The decision variables of this study are the customer’s lot size, number of packages, number of batches, and safety factors. A numerical example is given to illustrate the benefit of the model.