Open AccessOperational characteristics optimization of human-computer system
Author(s) -
Zulquernain Mallíck,
Irfan Anjum Magami,
Khaleed Hussain Tandur
Publication year - 2010
Publication title -
iium engineering journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.141
H-Index - 6
eISSN - 2289-7860
pISSN - 1511-788X
DOI - 10.31436/iiumej.v8i1.86
Subject(s) - readability , taguchi methods , font , task (project management) , viewing angle , orthogonal array , degree (music) , computer science , reading (process) , variance (accounting) , artificial intelligence , statistics , mathematics , computer vision , speech recognition , engineering , physics , accounting , systems engineering , liquid crystal display , acoustics , business , programming language , operating system , law , political science
Computer operational parameters are having vital influence on the operators efficiency from readability viewpoint. Four parameters namely font, text/background color, viewing angle and viewing distance are analyzed. The text reading task, in the form of English text, was presented on the computer screen to the participating subjects and their performance, measured in terms of number of words read per minute (NWRPM), was recorded. For the purpose of optimization, the Taguchi method is used to find the optimal parameters to maximize operators’ efficiency for performing readability task. Two levels of each parameter have been considered in this study. An orthogonal array, the signal-to-noise (S/N) ratio and the analysis of variance (ANOVA) were employed to investigate the operators’ performance/efficiency. Results showed that Times Roman font, black text on white background, 40 degree viewing angle and 60 cm viewing distance, the subjects were quite comfortable, efficient and read maximum number of words per minute. Text/background color was dominant parameter with a percentage contribution of 76.18% towards the laid down objective followed by font type at 18.17%, viewing distance 7.04% and viewing angle 0.58%. Experimental results are provided to confirm the effectiveness of this approach.