When developing home appliances, various ergonomic guidelines that conform to the physical user interface (PUI) design specifications are applied and used. However, developing products based on only the guidelines that conform to the design specifications of home appliances is difficult. This study was aimed at re-viewing various PUI guidelines for home appliance development and deriving design specifications by analyzing their usefulness. Among the controllers, which are representative PUI elements of home appliances, we focused on knobs, handles, and buttons and analyzed these ergonomic guidelines. Guidelines that are widely used in various industries were selected to determine the suitability of their ergonomics. These guidelines mainly review military standards, nuclear design guidelines, and general guidelines. For the knobs, shape, size, rotation direction, and rotational force are the main variables. Their size is determined mainly by considering design factors emphasizing safety. The direction of rotation at the time of use is considered. The category of buttons contains many guide items. However, the design and emotional aspects are not considered while designing their size and pressure. The product PUI is still designed using design specifications mentioned in these guidelines. However, as most guidelines do consider identical items, they tend to be used as rough reference values or are inferred based on similar guidelines. In particular, the guidelines do not reflect aesthetics, design trends, or emotional needs of customers. This is because they were developed in fields directly related to safety and not electronics. We attempted to determine the usefulness and applicability of these guidelines in determining the detailed specifications of the product.