Optimisation of micro W-bending process parameters using I-optimal design-based response surface methodology

Open Access

Table 4

Comparisons of several RSM models for springback.

Model	Sequential P-value	Lack of fit P-value				PRESS	Remarks
Linear	< 0.0001	0.0028	0.7687	0.7505	0.7190	565.82
2FI	< 0.0001	0.0557	0.9107	0.8908	0.8697	262.38
Quadratic	0.0018	0.1449	0.9406	0.9204	0.8921	217.30	Suggested
Cubic	0.0050	0.6427	0.9830	0.9593	0.7584	486.35	Aliased

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