R1 If x1 is Short and x2 is Wide and x3 is Short and x4 is Narrow then g = 0.9763 R2 If x1 is Long and x2 is Medium and x3 is Medium and x4 is Medium then g = 2.0054 R3 If x1 is Medium and x2 is Narrow and x3 is Long and x4 is Wide then g = 3.0185 Fuzzy set parameters x1 S=(4.2046, 5.3171, 5.9475) M=(3.7522, 5.9779, 8.2048) L=(4.3795, 6.5593, 8.2816) x2 N=(1.2431, 2.5759, 4.4562) M=(1.7047, 3.5304, 3.8480) W=(1.8674, 4.143, 4.935) x3 S=(0.3542, 1.061, 4.1049) M=(0.5027, 3.9518, 5.4715) L=(4.1304, 6.8883, 7.808) x4 N=(-0.3903,-0.0909, 1.097) M=(0.4008, 1.130, 2.3095) W=(1.1088, 2.1603, 3.0233)