I’m currently working in a furniture company that does mechanical chairs and tables. We perform a lot of tests to insure the good quality of the products. Some of the tests are torsion testing to make sure that the material is hard enough to twist without breaking by applying the maximum force. Another test is the applied force test, which is applying the maximum force vertically and horizontally to the product, and even if it has mechanism that makes it moves up and down, which most of our products do, we make sure that the motion is smooth enough and at the same time goes to a certain limit and stops moving. Of course every step during the process of producing a new part has to be examined for quality, but usually the final tests are the torsion and the force applied. Then before shipping the part, it goes through a drop test for shipping to make sure the quality of the packaging is suitable to support and protect this specific part.