Thesis - Teknisk Design

these interactions are already chosen, the suitable way to produce this interactionwill need to be determined. Then the chosen device to simulate these outputs has tobe programmed and implemented. Another version of the same device with a littlevariation, the lack of haptic feedback, would be implemented also. A prototypewith the two multifunctional devices will be ready to make a comparative study.With the conclusions of this study, some tips on how to adapt the prototype into theuser needs for its usage in next steps will be highlighted. Finally, driver benefits, as wellas the interactions chosen for having haptic output and their tacton should bediscussed.1.5 Delimitations and limitationsIt was considered necessary to differ from delimitations and limitations in this section.The difference between these two concepts is the willingness of the author to havethese restrictions. If the author sets the boundary is call delimitation, in the other handif it is set by something out of author´s control it is called limitation.There is lots of limitation in this project due to the freshness of the main topic.First and foremost, the possibility to access to some technology in the market hasbeen very difficult, not only for economical issues but also for novelty ones. There arenew discovered technologies in the area of haptic feedback that are not yetreleased for implementation to the industry because there is no possibility of helpcoming from the developers because it is still under elaboration. So, this thesis willtake both, economical and temporal delimitation into consideration when referringto haptic feedback technology.There are some delimitations set on the usability study. Due to the set time forthis work not long usability studies could be carried out. With long it is mean to carrya usability studies with a large number of participants. That is why further studieswould be advisable with help from this written material. Also related to the lack oftime there will be no test under real driving circumstances. It is necessary in moreadvanced steps to see how the car vibration might affect to the perception of theset haptic feedback.The other source of delimitation is the interaction with the audible feedback.Caused by the use of a vibrational device to produce haptic feedback, there issound coming from the device when it is vibrating. It was thought to carry the studymuttering them by making the users wears some headphones to eliminate thepossible effect on them. That is the reason why the prototype has not soundfeedback. But as the car engine sound from the simulator is loud enough to coverthe vibration sound, earplugs are not longer necessaries. The lack of audiblefeedback was point out by some participants in the study, and some of themsuggest the advantages of both feedbacks working together. However, as this studyis just a comparison and test, the one with haptic feedback and the one without donot include audible feedback the data is valuable. Audible feedback is out of thisproject and also the interaction between it and the haptic feedback.4