On visualizing the number comparison scheme in grey extent analysis

Purpose - The purpose of this paper is to illustrate an alternative number comparison process to the original procedure utilized under the grey extent analysis. Design/methodology/approach - Number comparison process is visualized on simple diagrams constructed on a Cartesian coordinate system. Discernable areas to assist related probability calculation were sought according to compliance with desired dominance conditions. Findings - By visualization, the author was able to obtain exactly the same probability information as those attainable by using the original number comparison process. Research limitations/implications - Reach of this methodology is merely constrained by the limitation of original method where whitenization values of interest uniformly distribute over the domains of related grey numbers. Originality/value - Number comparison with visualization is easy to comprehend and practice, does not require resorting to probability formulas and an understanding of probability concepts.