A person drops a cell phone from one meter high, puts it in a 360 degrees rotating box continuously, and even pours water on it. What is more, a person who weighs about 100 kg (220 lb) sits on it or presses on a button over 100,000 times. The reason the cell phone is tortured this much is because of the quality test done by the cell phone company. In order to improve the quality of the product, this company files customers’ complaints, examines the usage pattern, and adds to the check list.
Moreover, an airtight container company repeats flipping hinged lid over one million times as well as shaking the container with liquid in it for over 24 hours. And a rice cooker company uses at least 1.5 tons of rice whenever it releases a new product and tests the taste of cooked rice with 100 cookers every day.
Through such harsh quality control, new products are released. This is why they are sold like hot cakes despite recession.