THERE ARE 10 PRINCIPLES OF USABLE DESIGN**Jordan, Patrick W. (2002) An Introduction to Usability. Taylor & Francis Ltd.
1:CONSISTENCYDesigning a product so that similar tasks are done insimilar way.E.g. layout of controls in car (position of clutch, breakand accelerator)
2:COMPATIBILITYDesigning a product so that its method of operation iscompatible with users’ expectations based on theirknowledge of other types of products and the ‘outsideworld’.E.g. handphones with physical keys and touch screen
3:CONSIDERATION OF USER RESOURCESDesigning a product so that its method of operationtakes into account the demands placed on the users’resources (5 senses) during interaction.E.g. watching TV while driving.
4: FEEDBACKDesigning a product so that actions taken by the userare acknowledged and a meaningful indication isgiven about the results of this action.E.g. tail lights on car
5: ERROR PREVENTION & RECOVERYDesigning a product so that likelihood of user error isminimized and so that if errors do occur they can berecovered from quickly and easily.E.g. cancel button on ATM machine.
6: USER CONTROLDesigning a product so that the extent to which theuser has control over the actions taken by the productand the state that the product is in is maximized.E.g. adjustable chairs.
7: VISUAL CLARITYDesigning a product so that information displayed canbe read quickly and easily without causing confusion.E.g. labels for controls on product.
8: PRIORITIZATION OFFUNCTIONALITY & INFORMATIONDesigning a product so that the most importantfunctionality and information is easily accessible tothe user.E.g. buttons on control panel on dashboard.
9: APPROPRIATE TRANSFER OF TECHNOLOGYMaking appropriate use of technology developed inother contacts to enhance the usability of a product.E.g. remote control.
10: EXPLICITNESSDesigning a product so that cues are given as to itsfunctionality and method of operation.E.g. doors in public buildings.
STEPS IN DESIGNING A USABLE PRODUCT* Identify Establish Identify main effect of each characteristics goal(s) characteristics & relevance Testing / Review Ensure correct prototyping compliance design*Source: EASE OF OPERATION OF EVERYDAY PRODUCTS - PART 1: DESIGNREQUIREMENTS FOR CONTEXT OF USE AND USER CHARACTERISTICS(MS ISO 20282-1:2009)