Table 3 Comparison of optimum results of Model-1

FISM

630.98

799.15

$x_{111}^1=9$, $x_{121}^1=0.91$, $x_{131}^1=8$, $x_{222}^1=6.08$, $x_{121}^2=10.5$, $x_{212}^2=10.5$, $x_{232}^2=9.5$

Convex combination

651

748.5

$x_{111}^1=9$, $x_{131}^1=8$, $x_{222}^1=7$, $x_{212}^2=10.5$, $x_{221}^2=10.5$, $x_{232}^2=9.5$

Global criteria

669

711.2

$x_{111}^1=9$, $x_{131}^1=6.75$, $x_{222}^1=7$, $x_{232}^1=1.24$, $x_{221}^2=7.95$, $x_{212}^2=10$, $x_{231}^2=4.78$, $x_{222}^1=2.54$, $x_{232}^2=4.71$, GC = 0.1265