The careful design of some products makes the products convenient and efficient, brings comfort to customers, and customers don't have to read complex instructions or ask for help from others. On the contrary, some products are designed without considering users' habits and needs, so people will encounter difficulties or confusion in the process of use. This kind of products are called Norman Products.
According to the above definition, the bottom pulley of a large wooden wardrobe of a certain brand is of poor quality, and it is difficult for users to open the door is a Norman Product.