Figure 1. Residual plot of surface roughness by second order prediction model

From

Prediction Models by Response Surface Methodology for Turning Operation

Basim A. Khidhir, Waleed Al- Oqaiel, PshtwanMuhammed Kareem

American Journal of Modeling and Optimization. 2015, 3(1), 1-6 doi:10.12691/ajmo-3-1-1