Optimal control location for the customer-oriented design of smart phones

Taeil Kim, Eui Seung Jung, Youngjae Im

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Recently, the smart phone has become a representative device in information communication. The smart phone generally adopts a full touch-screen panel that reflects the growing need for improved multimedia access. In the interest of customer-oriented design, HCI features such as controllability and a menu structure have to be properly considered. Among the numerous factors that have an effect on the controllability when using smart phones, the effects of the phone size, user's hand length and control location are investigated in this paper. Moreover, an effort was made to determine the changes in the user preference according to the control location. A series of experiments were conducted, in which preference scores were measured. It was found that the product width and thickness have significant effects on the user preference. Specifically, the effect of the product width is greater than that of thickness. However, the optimal control location varies little regardless of phone size and hand length. A desirable phone size was defined for the customer-oriented development of smart phones. Iso-preference contour plots in the form of a rotated ellipse were derived by the Support Vector Regression (SVR) method while the difference in sensitivity was assessed with respect to the meridian (horizontal and vertical directions). The concept of the preferable control zone was developed by linking the critical points in four directions despite the difference in the angle of rotation. In addition, the situation where the product is concurrently controlled by both hands was investigated. The results of the study are expected to aid in defining the size of handheld information communication devices such as smart phones and PDAs. It is also expected that the optimal control location and proposed contours can guide the designer to optimally layout various functions of the menu on the display.

Original languageEnglish
Pages (from-to)264-275
Number of pages12
JournalInformation Sciences
Volume257
DOIs
Publication statusPublished - 2014 Feb 1

Fingerprint

Optimal Control
Customers
User Preferences
Controllability
Meridian
Support Vector Regression
Ellipse
Touch screens
Linking
Communication
Personal digital assistants
Multimedia
Layout
Critical point
Display
Human computer interaction
Horizontal
Vertical
Vary
Angle

Keywords

  • Control zone
  • Controllability
  • Mobile phones
  • Smart phones
  • Touch-screen design

ASJC Scopus subject areas

  • Artificial Intelligence
  • Software
  • Control and Systems Engineering
  • Theoretical Computer Science
  • Computer Science Applications
  • Information Systems and Management

Cite this

Optimal control location for the customer-oriented design of smart phones. / Kim, Taeil; Jung, Eui Seung; Im, Youngjae.

In: Information Sciences, Vol. 257, 01.02.2014, p. 264-275.

Research output: Contribution to journalArticle

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