A product is a physical item that is placed on the business for profit, consideration, or consumption, while a service is an intangible item, which originates from the output of one or more people. Although it seems like the main difference between the two theories is established on their tangibility, it is not always the condition. In most circumstances, services are intangible, however, products are not always tangible. The product-service system (or PSS). For someone who’d like a fast refresher, a Product Service System replaces a good with a service; instead of spending for the product itself (and whatever maintenance and upkeep it requires), you pay to use the product for a bit, and then give it back. Think of it this method: a Product Service System is usually a solution to the problem, “Hey, do you really want to own one of those?”