I need you to forget a bike.

Try again.

You can not.

And how it works? You know how is works because you form a conceptual model of the device and mentally simulate its operation. Visibility acts as a good reminder of what can be done. A result, there is little to remember.


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The mental model of a device is formed largely by interpreting its perceived actions and its visible structure.

Now, please recall the procedure for reheating something in the microwave. It is not what you want to do and instead other thing appears to be possible? One button to do two things? Oh, how can you figure out how to control the microwave? Ease like forgetting a bike? How hard it is to remember the bike and how to ride? Natural design, natural signs. Well -designed objects are easy to interpret and understand. Visible clues are important to their operation. Poorly designed objects are difficult and are frustrating to use. They provide no clues and even worse, sometimes false clues. “Humans do not always err. But they do when the things they use are badly conceived and designed.”

It is in everyone’s best interest to make designs simple to use. If a product is patched up with labels, instruction manuals or training courses, the whole purpose of the design is lost. Designers know too much about their product to be objective judges. Design process should evolve the product. Good design is like that, tested by users and changing.


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