Optimal Design for an Extruder Head Runner Based on Response Surface Method and Simulated Annealing Algorithm

Table 7

Variance analysis of objective functions.

Source	Free degree	Sum of squares	Mean square	value	value
Fit	9	0.170	0.019	4.97	0.012
Residual	10	0.041	0.004
Lack of fit	5	0.037	0.007	11.2	0.0093
Sum	19	0.208