Walmart has spent a shit ton of money on their analytics systems including open source and Teradata. They have agreements with various cell companies for geo-fenced info. So they have location analytics and your "market basket" data to slice and dice. Yet the results are mediocre and Amazon is kicking their ass with strategy. They have no loyalty program (Sam's has membership) to provide compelling packaged deals to shoppers, they have their Every Day Low Price pretense but check Neighborhood Market prices that vary wildly from super-center prices especially for grocery. In reality, WMT is a quasi-monopoly that is dying under its own obesity - it needs to split up. eCommerce at $16B is a joke considering it doesnt make any profit and has take billions in overpriced investment. The management, especially in tech, barely see projects through and has lately removed several long-time employees for "fresh blood". Add turnover in SV and other places, it is chaos.