SPIF	Single-point incremental forming
VFC	Vertical Force Component
ML	Machine learning (AI field algorithms)
ANN	Artificial Neural Networks
MLP	Multilayer perceptron
SVM	Support Vector Machine
GPR	Gaussian Process Regression
KNN	K-nearest neighbors algorithm
RMSE	Root Mean Square Error
MSE	Mean Square Error
MAE	Mean Absolute Error
ST	Standard deviation