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DESIGN PRINCIPLES

BY JOSHUA O SHEA


AF FO RDA N C E S: GOOD VS BAD

Apple are iconic for sleek designs. Everything about a MacBook looks perfectly planned yet one irregulairty is clearly visable on the front of the laptop which invites a user to place a finger. The fine line on the edges also envoke the curiousity of a user to find out if the object can be divded into 2 parts.

T HE P R I N C I P LES OF DESIGN

This sleek, modern control seems very straight forward. The volume and channel settings are designed as a button interaction, an object which is synonymous for it need to be “pressed� . On this control you are required to slide / push the button up or down to change the settings. This leaves a user confused, as there action would be to press the button, this is a conflict between the design affordance and the aesthetic. This is not an intuitive piece.

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F EED B AC K : G O OD VS BAD

For most electric showers you are required to flick a switch in order to activate the system. This switch uses a loud click combined with a bright LED to convey feedback and let a user know that the shower is activated. When the switch is deactived it creates a soft click to allow the user to know it is off. It creates two distinctively different tones for “on” and “off”.

T HE P R I N C I P LES OF DESIGN

This is another example of a shower system switch. In contrast to the previous switch mentioned, this allows no feedback to the user to indicate if the system is activated. No visable visual indicators can be seen. There is no distinct feeback on the UI of this object for the user, they are required to go into the bathroom and press the start button on the shower to assess if the system has been activated. This switch also has no mapping of buttons, therefore there is no indication of which postions in on or off. P. 2


C ON S TR A I N T S: GOOD VS BAD

The lid of this coffee cup acts as a constraint, this is due to the fact that there is only one opening through which liquid can easily flow. This lid constrains how the user can drink and also how much liquid can exit the container at any time. The clip part of the liquid is a constraint exception hanlder, it prevents the liquid from spilling the the cup is knock on its side.

T HE P R I N C I P LES OF DESIGN

A common error wtih using some Unix terminals, in regards to issuing command lines is that if a command input begins to get too long, the system will not skip to a new line but will infact start to overwrite itself on the same line. This system example has no constraints to act as “exception handlers� to constrain or correct the system when the command has reached too many characters.

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M AP P I NG : G O O D VS BAD

Desingers at GHD used colour coding and iconography to successfully map the intereface of their devices. The subtle red clearly relates to the “Heat” , its uses iconography in the form of waves to let a user decide what “heat wave level” they wish to set the device to. It terms of control mapping this device does a good job, the heat button also acts as the start button, this technically acts as a type of constraint too as it allows the user to activate the heat on the device without the fear of getting burnt straight away. T HE P R I N C I P LES OF DESIGN

Samsung attempted to simplfy the remote control. Unfortunalty the designers got carried away with the over simplfication of the device and as a result, the users understanding and usability of the overall device suffered. These icons situated at the for corners of this wheel are an example of poor mapping, a user would believe these are icons representing what the wheel could do, infact this icons are individual buttons with seperate functions not associated to this wheel.

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QUESTIONS?

UI / UX Design Principles.  

A short presentation created as part of M.Sc in Interactive Design group at the University of Limerick. Good design and user usability is at...

UI / UX Design Principles.  

A short presentation created as part of M.Sc in Interactive Design group at the University of Limerick. Good design and user usability is at...

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