Internet Shopping Optimization Project (IShOP) is an INTER POLLUX project, co-funded by Luxembourg National Research Funds (FNR) and the Polish National Research Centre for Research and Development (NCBiR). This project proposes innovative and realistic models for different typical online shopping operations, supported by strong mathematical and operational research fundamentals, and well balanced with lightweight computational algorithms. These models are designed in order to allow the optimization of such transactions. Finding accurate solutions to the defined problems implies both lowering customer expenses and favouring market competitiveness. Role: Work package leader.