What are the 4'ms of industrial engineering?

The 4 M's of industrial engineering are Man, Machine, Material, and Method. These elements are crucial for analyzing and optimizing production processes. "Man" refers to the human resources involved, "Machine" pertains to the equipment used, "Material" encompasses the raw inputs, and "Method" involves the processes and techniques employed to transform inputs into outputs. Together, they help improve efficiency, productivity, and quality in industrial operations.