The article discusses how retailers can measure the success of their inventory investments using a tool called GMROII. This tool helps retailers understand how well their money used for inventory is performing by looking at total sales, profit margins, and inventory costs. GMROII can also be used to evaluate employee performance in selling products. The study concludes that while GMROII is a useful tool, retailers need to consider the impact of their programs on costs, margins, inventory, and customer satisfaction to make sure they are getting the best return on their investments.