Slow Obsolete Products (SLOPs) A Slow Obsolete Product is a real bottom-line killer and also an inventory "black-eye". This situation defines bad business and we have seen it over and over: a company purchases pallets of products from a slick salesman who gives them beautiful promises of soaring demand as well as staggering returns. Somehow, once the product hits the shelves, it seems to put down roots and become a