How to make an easy-to-use user interface

Luxurious bathroom scene as department stores in central Bangkok, a middle-aged man walked into the sink after he had errands done. I stood in front of the sink for a little moment. His eyes staring at the faucet in front. I do not know how to open this faucet ...
These images, we would have seen it used for a bathroom faucet, sensor systems, some people discover an open faucet of trial and error. Some people know it is open, however, after watching others do actually faucet is designed to allow people to use it more convenient. Why some people can not use it in the first encounter.

Affordance know

Interface can be a good indication of how to use it by itself.

Whatever design We must build up the affordance, that is an indication that users know that they can interact with it by way. Let us design a door We have to build something that will allow users to be able to know how to open this door. If we use the knob Users will know that the door can be opened with a simple twist of the knob. If we opt for the captures Users also need to understand that if we have to pull the door open. Imagine if we took the door knob to stick to the pan. Users are confused, do I?

Users have to know why it took them to do?

We ever wondered why we do not know what this is doing. Why do we know that the door must be pulled / pushed. Why do we have to move the door. Why do we have to walk door closer. It is open to
Various interface design is often a way to do the same popular design because the designers are of opinion that this way it will allow users to easily understand him. We will call these methods popular. "Conventions"
Conventions can be found everywhere in daily life. Whether it's a bottle cap designs that often feature spiral. The design of the bottle cap is often a soft cap. Or even to design the open beer cans. To see how we can turn these by liquid containers must not think hardly anything. Because we are used to it anyway, so whatever design conventions used to help make users know how to use those things. Quickly
But we do know, however, that this convention is the best? Of course, no one knows Until someone who can create a new convention itself. The question is when is someone able to create a new interface into a new convention and why users have to know how to use it. Since I had never used it before? The answer is, it must have some interface that allows users to hint that something is. Can not do anything with it.

Users must not let our thinking (too much).

To let users know that they can do with this interface which can be divided into two kinds.

A self-evident

Interface to the Interface Label is bad.

This interface is to make it clear affordance size seen at a glance that it took to do anything. For example, how to design and use ax anyone out exactly how to use it is to put his hand on the ax handle, then use a sharp ax to cut trees. No one took them to the edge of the ax handle, then remove to nail it.
However, some interface is difficult to establish a clear affordance. In this case we may have to use the "Label" to help, for example buttons. In a pilot who has not filled out if there is no label, then the pilots to distinguish which button it is doing, it would be difficult to see.

Is meaningful in itself.

Sometimes Interface is clear in itself. Interface is not better than that meaningful in itself always.

Time driving to various places. We've noticed signs or not. It consists of two main parts: the part of the arrow. And the text is Why designers to either choose not to use it? If we change from an arrow pointing to the right, the word "right" is better, it will be clear in itself. Mysterious Nobody
If we change from an arrow to a text. The perceived meaning of users to slow down the course. Because we are able to perceive the meaning of pictures or symbols faster. Do not forget that the signs of these users have only a moment to look at and then use the arrow will allow users to scan for a place faster. Because the brain is able to separate the arrow out of the text. As the name makes the place stand up.
However, in part as a place. We still need to use a text anyway. Assuming that this arrow will take us to the "Ang," if we use water instead of literal gold. It can not possibly convey clearly much. Using text to convey the place that it is an alternative that is more appropriate.

Our user-friendly UI really so?

If you think back to the sensor faucet is that we think it will help users to work more easily, but it might not be as strong as we thought. Since the sensor is not reached with the convention of design faucets on users find this faucet. I'll have to think extra hard.
We met at the faucet First, it is We must look for faucets that kind. If spigot symmetric Is the same as the left - right. We will try to spin it to open. If spigot shaft sticking out one side. He will try to push the lever to the other. However, if the stem is sticking out straight. He will try to push the lever up. Can see that sensor faucet is not what users are accustomed to.
When people find a familiar face. We'll start by trial and error. We may begin to try his hand touches the tap. To see if it has a mechanical button or something hidden or not. When fumble for a while sensor is able to detect hand. Water will start flowing out of the tap is that users must use the idea at all. If you do not use something designed using conventions.

Cognitive Overhead

Although the procedure is a lot of it. But it's not going to make me frustrated Users If each step, it does not require much thought.
- Steve Krug -

To design things We should not care, just to reduce complicated procedures to shorten it. Because the cutting process anything away. May cause the rationality of that decline. This will allow users to figure out why I own more.
Thought processes, all users have to do before they can understand something that is called "Cognitive Overhead" Although interface is easy to use yet but if it has cognitive overhead high, then it is considered to be the preferred interface. being difficult to use If you want to reduce cognitive overhead less easiest method was designed based on existing conventions.

Conventions then this will happen?

Unfortunately, the following conventions will continue to block the creativity of these designers, but this approach is how to design the safest, however, it does not mean that reinvention. It should not be done at all. But we must ensure that our thinking is great enough to replace the existing conventions, it is only yourself.