Walmart provides GMROII data to its suppliers
Indeed, inventory is often the 2nd most expensive thing for retailers to operate. And, in the case of Walmart, their large stores stock as many as 200,000 items!
.. Through Retail Link, Walmart essentially gives suppliers all of their sell through data by SKU, by hour, by store. They also give vendors on-hand inventory by SKU, as well as gross margin achieved, inventory turns, in-stock %, and yes, the metric of GMROII! Essentially, Walmart has created a vendor managed inventory system where they let you the supplier decide where to put SKUs and how to ship through to stores.