표 4 상관계수 | Correlation coefficients.

Variable	Pearson correlation coefficient	Kendall’s tau
Demand A	0.48*	0.17*
Demand B	0.15*	0.07*
Demand C	−0.11	−0.03
Demand D	−0.07	−0.02
Supply A	0.27*	0.09*
Supply B	−0.01	−0.01
Supply C	0.04	0.01
Supply D	−0.03	−0.03

denotes the statistical significance at minimum 5 % level.