Abstract
The main objective of this work is to determine the reading performance of operators’ under different viewing angles of a desktop computer. The effects of text/background color, viewing distance and character size on the speed of reading were investigated. The text and/or the background color combination were varied, with constant luminance contrast. Performance was recorded in terms of words per minutes. Standard workplace design recommendations to position center of visual display terminal 15° and 40°, below horizontal eye level, were taken up for a visually intensive readability task. An orthogonal array, signal-to-noise ratio and the analysis of variance were carried out to investigate the above mentioned operating parameters to determine optimum readability performance. The results suggested that performance was better at 15° viewing angle as compared to 40°.
Highlights
One of the consequences of the information age is that people increasingly rely on computers to do a variety of everyday jobs, like, reading information through webpages, processing data, writing report, sending e-mail
Use of this quality tool has been made for process optimization combining several factors together i.e. text/background color, viewing distance and character size
This result is consistent with the finding of Wang et al (2002), Wang and Chen (2003). In both the experiments it was found that preferable viewing distance is 60 cm. This finding is in agreement with Jaschinski-Krutz (1991; Szeto and Lee (2002); Jaschinski-Kruza (1998).Viewing distance may reflect the appropriateness of various aspects of visual display terminal (VDT) design
Summary
One of the consequences of the information age is that people increasingly rely on computers to do a variety of everyday jobs, like, reading information through webpages, processing data, writing report, sending e-mail. The Taguchi method is a well-known technique that provides a systematic and efficient methodology for process/design optimization It has been widely used for product design and process optimization worldwide (Wang and Tarng 1998; Chung-Chen and Hong 2002; Nian et al 1999). This is due to the advantages of the design of experiment using Taguchi’s technique, which includes simplification of experimental plan and feasibility of study of interaction between different parameters. Taguchi proposes experimental plan in terms of orthogonal array that gives different combinations of parameters and their levels for each experiment
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