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Usability

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  • 1. PRODUCT ERGONOMICS & SAFETY CHAPTER: USABILITY NURUL IKHMAR IBRAHIM SCHOOL OF MANUFACTURING ENGINEERING UNIMAP
  • 2. TODAY’S TOPICUsability Concept Principles of Designing & Definition Usable Design Usable Product
  • 3. USABILITY IS HOW EASY A PRODUCT IS TO USE
  • 4. DEFINITION BY ISOThe effectiveness, efficiency and satisfaction with which specified users can achieve specified goals in particular environments. ISO DIS 9241-11 USABILITY CONCEPT & DEFINITION
  • 5. The extent to which agoal or task isachieved with theproduct.Does it do what the usersneed and want? EFFECTIVENESS
  • 6. Theamount ofeffort required toaccomplish a goal.How long does it take touse a product?How many errors that auser make before a taskis completed? EFFICIENCY
  • 7. The level ofcomfort andacceptability ofthe product to its usersas a means to achievetheir goals.How pleasant is it to usethe design? SATISFACTION
  • 8. WHY? USABILITY IS IMPORTANTUSABILITY CONCEPT & DEFINITION
  • 9. Usability dependent on: WHO is using the product. PERSON-PRODUCT INTERACTION
  • 10. Usability dependent on: The GOAL that they are trying to achieve. PERSON-PRODUCT INTERACTION
  • 11. Usability dependent on: The ENVIRONMENT in which the product is being used. PERSON-PRODUCT INTERACTION
  • 12. USABILITY FRAMEWORK
  • 13. TODAY’S TOPICUsability Concept Principles of Designing & Definition Usable Design Usable Product
  • 14. THERE ARE 10 PRINCIPLES OF USABLE DESIGN**Jordan, Patrick W. (2002) An Introduction to Usability. Taylor & Francis Ltd.
  • 15. 1:CONSISTENCYDesigning a product so that similar tasks are done insimilar way.E.g. layout of controls in car (position of clutch, breakand accelerator)
  • 16. 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
  • 17. 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.
  • 18. 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
  • 19. 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.
  • 20. 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.
  • 21. 7: VISUAL CLARITYDesigning a product so that information displayed canbe read quickly and easily without causing confusion.E.g. labels for controls on product.
  • 22. 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.
  • 23. 9: APPROPRIATE TRANSFER OF TECHNOLOGYMaking appropriate use of technology developed inother contacts to enhance the usability of a product.E.g. remote control.
  • 24. 10: EXPLICITNESSDesigning a product so that cues are given as to itsfunctionality and method of operation.E.g. doors in public buildings.
  • 25. TODAY’S TOPICUsability Concept Principles of Designing & Definition Usable Design Usable Product
  • 26. THERE ARE 6 STEPS INDESIGNING A USABLE PRODUCT
  • 27. 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)
  • 28. Thank You