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Table 4 Analysis of variance for surface roughness (Ra)

From: Experimental investigation of surface roughness, flank wear, chip morphology and cost estimation during machining of hardened AISI 4340 steel with coated carbide insert

Source DOF Seq SS Adj SS Adj MS F P value C (%)
v 2 0.042169 0.042169 0.021084 13.37 0.070 21.93
f 2 0.135049 0.135049 0.067524 42.81 0.023 70.22
d 2 0.011942 0.011942 0.005971 3.79 0.209 6.21
Error 2 0.003155 0.003155 0.001577    1.64
Total 8 0.192314      100
  S = 0.0397157 R-Sq = 98.36% R-Sq(adj) = 93.44%