Step out of your shoes for a moment. Frank is about to design a new supermarket. Now, he's got a relatively tight budget, so he's probably looking to reduce material costs wherever possible. He might place the frozen food section next to the vegetables to cut down on cooling costs and arrange the shelves based on how easy it is for staff to restock shelves. It's not long before his new supermarket is operational – but there's a problem. Customers are having trouble finding the food items they need, and constantly getting lost in the aisles.