… meeting the needs of the present without compromising the ability of future 

 … designing products with a short lifespan to boost the economy. 

… meeting the needs of the present by compromising the ability of future generations to 

… using resources before anyone else gets them. 

… the user purchases the product.

… the user first hears about the product.

… the user stops using the product.

… the user starts using the product.

Understanding usability allows creating generic designs, which allows good user 

Understanding usability allows creating cheap designs, which allows good user experience 

Understanding usability allows creating sustainable designs for users, which allows good 

Understanding usability allows creating usable designs for users, which allows good user 

… the company. 

 … the product. 

… everybody in the world. 

… specified users.

Because Donald Norman is bad at designing doors.

Because a device as simple as a door should not need an instruction manual.

Because they do not meet the building codes, i.e. the rules of what kind of doors can be 

Because the materials used in the structure break easily.

… the user interface will be pleasing to use by the specified users.

... the user interface will be aesthetically pleasing for the designers. 

… the user interface can be difficult to use by the specified users. 

… the user interface is easy to use by the specified users. 

… the technical design of a product, as only the technical execution of tasks is considered. 

 … everything up to the point the user starts using the product, for example marketing, 

… the visual design of a product, as this is what is visible to the user.

… all aspects of the end-user’s interaction with the company, its services and its