<p>Fixed abrasive lapping which is generally carried on lapping machines can achieve high material removal rates and nanometer level surface roughness on hard brittle materials like K9 glass, silicon wafers and alumina ceramics. By using a fixed abrasive lapping pad as a tool, on CNC milling machines, the nanometer level surface finish is attained the thin metallic aluminum sheet. This unique CNC Fixed Abrasive Lapping (CNC FAL) process able to achieve the surface finish upto 6&#xa0;nm by showing 96% improvement in roughness average. Additionally, the ANN model’s with network structure of 4-10-1 used for prediction of Ra. The augmentation of the data obtained from the regression equation and used to train ANN and accuracy of the model found to be 99%. Results demonstrate that the ANN model effectively predicts the roughness average using CNC FAL of Al sheet</p>